Well, the upgrades are complete.
To get around the "big bore" shock issue, I added a piece of heatshrink tubing to the shock and used Slash spring retainers. The heatshrink was the perfect thickness to take up the slack on the top retainer.
The only things left to do:
- Come up with a decent way to seal the diff so I can tune it. There was an article in an R/C mag I saw at the LHS that describes how to do it. Basically, you dremel down the outdrive raised part flush with the rest of the diff. Then, countersink the outdrive hole and put an 8th scale o-ring in there. The o-ring should stick out as far as the original raised section that was dremeled off. Then add a thin shim, then outdrive bearing. To seal the diff cover, some RTV silicone. I have an extra diff that I'll be trying this on. But I'll wait to actually replace it until the existing diff goes out.
- Change the top shock mounting scheme. I want to replace the shoulder bolts with long bolts/nuts and use some type of spacer/shim to use in the shock cap.
But she's running now and am quite happy. Even with punch control at 70%, timing = low, and start power = low, it still has too much power for those Slash tires. Perfect!