(update june -19) 1/16 HL tiger 1 3818 internal supports, final drive bearing supports and some spare parts

A package of supports I made for my heng long tiger 1 with plastic hull and metal road wheel plates. I noticed a lot of flex on my gearboxes after mounting mato metal tracks and driving wheels, and the tracks loved to de-track themselves even after some adjustments to tension and alignment. After adding these braces to the gearbox and axle outputs my tracks stay on much more rigid. The tank also feels more responsive as less power are turned into body flex, directing all the mighty 390 motor power to the tracks only.

internal braces for the gearboxes and axles (tiger3.stl). These snap onto the gearbox front and rear, and helps stabilize the gearbox shell and the body of the tank. I attached mine to the hull with small screws.
UPDATE May 2019: made a reworked central bracket that will allow cable management to the newer versions, as the connector print board are attached over the gearboxes on those.

axle supports: If you have one of the later versions there are outer rings under the faux gearbox covers at the axle outputs, and this is where the axle braces go. They fit 12 x 8 x 3.5 mm ball bearings and supports the axles much closer to the center of the drive wheels. This will help prevent axle snapping. I drilled some holes and used small screws on mine, but I guess glue could also do the trick. They will also probably fit older tanks, but the chassis wont support these as they lack the plastic ring molded onto the chassis, so you probably have to support them in some other way.
You also need to compensate the shrinkage of your material on this one to easily fit the bearing inside, the dimensions are true to size.

UPDATED May 2019: added a reinforced design for this, as one of mine broke after a few hours of gravel and wood driving (high strain on the drivetrain). This now has an avaliable lid. Attach the lid with glue or small screws, but the driving wheels will also keep them somewhat in place without other remedies.

UPDATED "final drive" june 2019: why not just go all the way? Two complete final drive housings for the bearings. One with a hole for a screw, one without. Modeled loosely after blueprints and historic photos, not 100% correct but the lacking details are not that visible at this scale anyways. Dimensions are copied from my HL ones.
You can fit bearings up to 6mm thickness in this version, and the lids for the others wont fit here but the drive wheel itself closes this system up pretty good.
Also be aware, the groove in the middle on the bottom is raised 0.25mm, you need to add build plate support to avoid deviations and slipping prints.

spare gun mantlet cover (tiger2.stl). This simply replaces a broken cannon assembly mantlet cover, the part where the two screws go into the shooting gearbox, cheaper than getting a whole new assembly. Use glue liberally.

extended battery well (tiger.stl). Remove the front wall in the battery well and glue this inside your tank to get better battery space and a better stowaway for your cables and lipo alarms or what have you.

Print with settings you feel fit your printer for such parts, I used PLA and 0.8 nozzle, 30% infill and double outer walls.
UPDATE May 2019: double outer walls for the axle supports may be too weak, I printed the reinforced one with triple outer walls and 60% infill.