Kyosho Ultima ST Racing Sports rear bulkhead Type-R/EVO style UMW-204/RS-144

thingiverse

This is a Kyosho Ultima ST Racing Sports GP (maybe EP and Ultima RB also, i havent checked it, so i cant confirm that) rear bulkhead, which imitates the Type-R and EVO version rear bulkhead. This has 3 additional upper arm location points per side, so you can adjust your suspension more accurately. This part nr. for stock Ultima ST is RS-144, but as this imitates -R/EVO part, the more accurate part. nr for this part would be the UMW-204. Part is reinforced a little, but the suspension geometry is untouched if you use Type-R/EVO rear wheel hubs. With stock Racing Sports hubs (part.nr. RS-18), the rear upper arm angle is just slightly in different position than stock, because the Type-R/EVO uses ball joint connection in rear hubs and stock Racing Sports version uses cheap screw connection and the rear hub upper arm connection point is upper than -R/EVO versions. The angle difference is so small, that i dont think it matters for casual drivers. I printed this to my own car using CF/PETG filament. You only need minimal supports to print this part. (Turn it around 180 degrees in slicer if the oriention is the same as in the thingiverse preview picture). Mounts perfectly to stock Racing Sports GP chassis plate and also Type-R and EVO chassis plates. Edit: Updated design file 19.3.2020. Fixed slight flaw with one screw hole location (chassis screw hole). Enjoy and drop a comment how did it work for you, or if you want any changes to be made! Heres the link for my project: https://www.rc10talk.com/viewtopic.php?f=30&t=44634