Sure - let’s see the difference between this and the older models splines. Actually I was pretty surprised to see the u joint in there. I thought this was something along the lines of motoguzzi with a round splined gland serving the pivotal/driving role.
As per the tuneecu Stef: first hand info - i have first gen Rocket and the latest tuneecu version i have on my Android tablet requires wireless connection ONLY.
As they stopped the PC version completely if you’re new to all of this I am afraid you’re sentenced to wireless.
The older version might still be kicking on a PC but I guess you will not be able to license it. Just guessing and might be wrong which happened plenty of times before
Thanks for the words of wisdom oj the splines - hope I will not be the first stripper

thought even about filling these in with TIG wire and finding a machine shop to have them recut. Have the whole winter for this - we will see. Only thing is I don’t want to dismantle the ujoint but… this also could use some fresh quality grease after all these years. Not fitting greasing zerks in places like that should be punishable by sore pr.ck.