Pro Shop Futaba is a nice shop. I have dug through thier parts before.
Just one more place to pick a up Spada.
I have got the washers together to lock the rear diff. I will be trying it out Tuesday. I used a combo of F103 diff washers.Its pretty simple to switch back if it dosent work out.
That little black spacer for the diff is a little strange.but it held up the last time i ran it. I was afraid i would melt it.