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Moin, read a lot here in the past few month, thanks so much for all the input!
Actually rebuild/upgrade a Kyosho Inferno 10 (perhaps) for some vintage racing. Found it in lousy condition w/o engine – ideal for some electric conversion. Body – I´ll try to fit the Optima Mid Custom Special..

First step disassembling and rebuilding/shimming the diffs. “greased” with 10k in Font, 30K middle and 1K in the rear.

Reworking some Kyosho Platinum Shocks for the project, but I need to create longer front tower to fix them and.. the Kelron ones work very smooth so far. Polished the rods, drilled 2 hole 1,5+1,1mm in the front piston, 1,5*2 in the rear ones and filled with 27,5K TLR oil. Original (black) Kyosho springs measured with 63g/mm rate in front and 28g/mm rate for the rear.

Laydown servo (w/o spongy saver) for low CG and alloy steering nuckles that seem to be Lazer ZX but aren't. Fresh Kyosho rims in front and (Dowanol PM stripped off) original ones in the rear:

Measured some vintage LRP X Generation motor, it’s a Silver E 16*3 , but think not enough power for the ”heavy” metal Inferno 10 drive train, eta is about 78%- not too bad for 30 years.. I´ll stay BL, tried to reverse my sensored combo(for front Motor), no chance-so I put in a big C set firstly.

About 25% weight/ wheel:

Seems to fit..?

Tried to remove the old paint w dowanol but feared to destroy the o decals, so scraped off the paint..

The original Kyosho Inferno 10 didn't come with sway bars, so installed some custom made by 1,3mm piano wire:

I look forward to see it finish.
Have you concidered designing 3Dprited parts to make the rebuild easier?

Shapeways.com

SPA240WS wrote: ↑Thu Nov 09, 2023 8:39 am Tried to remove the old paint w dowanol but feared to destroy the o decals, so scraped off the paint..

See if you find reproduced stickers on this website. Here is a link. Not too expencive

https://mciracing.ca/collections/kyosho?sort_by=manual

I ordered reproduced stickers for Turbo Inferno on this webside - a 30 year old model.
See if you can buy reproduced stickers for your car and buy a new bodyshell.

SPA240WS wrote: ↑Thu Nov 09, 2023 8:39 am Tried to remove the old paint w dowanol but feared to destroy the o decals, so scraped off the paint..

Here is a link to brand new reproduced stickers for your car. It is meant for Kyosho Optima mid Custom.

You can buy brand new stickers that looks exactly the same as the stickers you allready have. And then you also can buy a new body shell if you want

here is a link to the stickers you need: https://mciracing.ca/collections/kyosho/products/1-10th-kyosho-optima-mid-custom-special-decals?sort_by=manual

MCI is nice! Shipping to germany quite expansive.. try to plot some selve made kyosho decals.
More pics follow..

Some more pics, motor mount 6mm alloy:

First test ride with 2S Lipo and 14T pinion done, just smiling , handling is awesome (especially for a 30 yo car)..some finetuning lateron.