as a general rule the universal type are stronger the cv style is smoother but that goes out the window depending on what brand is making sead shafts
the universal joint or u joint or whats being refered to as a c joint by the op works best when the trans output and axle pinion are parrallell
the cv or constant volocity joint wants the axle pinion pointed at the trans output
thats more real wold thinking on a rc it dosent matter so much 1 because crawlers dont go fast enuff to develop strange harmonics and vibrations
and 2 the forces on the bearings and other componints are so small nothing is gona explode or ware out any faster cause yiur shafts are out of alignment
and 3 your not in the vehicle
basicly on a rc it dosent really matter what style shaft you use as long as its strong enuff to do what you need it to
i like gds brand shafts but they just a rebrand of someone elses shafts and i dont know the parent companys name that actualy makes them and there cv style but they have been pretty strong
incision makes some nice looking universal style shafts i have never used them my self but being a vanquish product im sure there bullet proof
if your looking some something wild or just plain crazy the axial wildboar hd8 shafts are crazystrong for being plastic and there extremely easy to customize and the shaft kit is cheap the shaft ends arent cheap though but thats the beef part and once you have the ends you can make a shaft any size you need from 1 inch to 2 ft
drive shafts you kinda get what you pay for its one part you dont want to cheap out on that sead mip might be over kill on most rigs
you still need to be carefull though
i look for hardend steel machined shafts with big beefy splines and stay away from anything stainless or aluminum
if you do cheap.out there are some bandaids that can be done to keep the cheap shafts together sometimes but best to spend alittle extra for something you can trust especialy if your just getting started
after rereading the original post i think the hd8 wild.boars might work best and since its axial already you know it fits
heres a link to the full kit
https://www.ebay.com/itm/1339604592...QdsP-LyQl6&var=&widget_ver=artemis&media=COPY
thats not cheap i know but you have other options like used
https://www.ebay.com/itm/1242684717...QdsP-LyQl6&var=&widget_ver=artemis&media=COPY
and theres the spline kits if you want to make custom langths or twist a shaft
https://www.ebay.com/itm/1338804037...QdsP-LyQl6&var=&widget_ver=artemis&media=COPY
and the coupler ends if you ever needed one
https://www.ebay.com/itm/1329138509...QdsP-LyQl6&var=&widget_ver=artemis&media=COPY