Metal Driger (Hasbro Metallic Dark Green Ver.)
Hasbro special release of Metal Driger using Right Customize Engine Gear and CEW Metal Semi-Flat instead of Heavy Metal Gear and Heavy Metal Core.
Picture provided by @4d_fury
Weight: 4.7g
Right Spin:
Flat faces with vertical lines for Spike Attack
Recoily, once controlled it has decent power but not enough to be truly competitive.
Triangular protrusions get in the way a little, worsening consistency.
Left Spin:
Well angled and well shaped contact points, and triangles don't get in the way too much here.
Does have somewhat limited reach however.
Very similar in shape to Cross Attacker (albeit mirrored), but contact points face just slightly further outward which makes all the difference to its effectiveness.
Competitive Smash Attack AR in this direction.
Best used with Ten Wide for better contact point exposure.
Weight: 16.1g
Heaviest legal Weight Disk.
Compact size and weight distribution makes it excellent defensively but not useful for Attack
Excellent for sustaining RPM – helps with defense, grinding, force smash, upper, and also defending against the last three.
Primary choice for Compacts, Traditional Upper Attack, Weight Defense, Circle Survivor Defense, and a competitive choice for Force Smash and Driger V2 combos.
With faster Attack Blade Bases (i.e. Defense Grip Base (Tip Inverted) and SG Grip Change Base Tip setups), Ten Heavy can be used without loss of speed, and its high weight becomes quite useful with Attack Rings such as Square Edge and Hayate Attack Ring, improving their rotational Smash characteristics however the reduction to the flywheel effect otherwise provided by Wide Defense or Ten Wide tends to result in more recoil KOs. It is nonetheless an acceptable option.
Overall a very versatile Weight Disk and a must-have part, outclassing both Heavy and Eight Heavy in all aspects, as well as being generally superior to Heavy Attack.
Weight: 6.7g
A regular right-spin Engine Gear that uses Customize Engine Weights
The engine gear gimmick does very little of use - if it activates early it breaks flower pattern and sometimes self-KO's, if it activates late it causes major instability in most cases, and in the case of Attack Types where it can cause a late game burst of movement (albeit usually an ineffectual one), it lacks a suitable tip to work with.
You're usually better off not winding the SG, rendering it an excessively tall combo, prone to attacks from lower attackers and struggling to hit anything without using an overhanging AR such as Triple Tiger.
Sadly, the only rubber tipped CEW, Metal Grip, is quite slow without the speed of Left Engine Gear (Turbo), and the only Engine Gear tip that was actually decent for Attack, Right Engine Gear (Metal Flat), was never made into a CEW, rendering any offensive usage moot.
Weight: 6.9g
First Clutch activates at start of battle. Slightly less self-destructive than Final Clutch because the Beyblade resists the destabilisation caused by the Engine Gear's activation, instead it breaks flower pattern and sometimes self KOs.
Has decent LAD compared to most Engine Gear BB's, however as it does not actually assist the LAD of Right Customize Gear (Free Shaft Version) + CEW Light Sharp combos and tends to get in the way, it is outclassed by Normal Base (Wolborg 4 Version) and Normal Base (Rock Bison Version)
Triangular protrusions cause minor recoil issues, but not overly terrible
The lightest Clutch-Equipped Engine Gear Blade Base (with First Clutch Base (Zeus Version) being the heaviest), though both Normal Base (Rock Bison Version) and Normal Base (Wolborg 4 Version) are lighter.
Not a useful part.
Weight: 3.6g
Slightly more of a Semi-Flat tip than the Engine Gear tip it is based on, as it actually has bevelled edges
Too aggressive for survival customs and not able to take hits well enough for defensive ones.
The fact Engine Gears are so tall, combined with the poor grip and limited speed and aggression of the tip limits usefulness for Attack type customisations.
Overall, not a useful part.
Overall
Hasbro unfortunately released this Beyblade without the Heavy Metal Core, causing enough fan complaints to add reasoning to its Q&A Page, explaining "We designed our Metal Driger top with an Engine Gear core, giving it superior speed and overall higher performance." I will leave it up to the reader to determine how they feel about this comment but would generally advise buying Takara or SonoKong's version instead. While Right Customize Engine Gear and the Metal Semi-Flat CEW are arguably more useful than the standard Right Engine Gear (Metal Semi-Flat) of the initial Hasbro release, it only makes it marginally less awful - and no less depressing, as it means Hasbro passed up a second chance to release the Heavy Metal Core.