[Overdriven]

Well the lower arms are going to take the most beating, so I'm not sure how strong the upper link mounts really need to be. But I would go with some sort of aluminum tower so you get a stronger link mount. Most aluminum towers are probably going to be thinner than you might like to reduce weight. IMO the design of the link mount on those should be strong enough. And I doubt anyone is going to make a tower that is thicker, due to the design and the extra machining that would be required.

The double links you used look like 1/10 2wd, if you use maxx/revo or other beefier 1/8 you may only need one. If you have a welder, just cut and slice with a sleeve over the splice instead of hunting down the correct length. You could then also go right to the pillow ballwith the link and not have a piece of "arm" in between. Just a thought to consider.

For extending the towers, another member used a flat aluminum plate bolted to the original tower with the shocks bolted to that. Can't remember if it was a slash 4x4 or a ofna/jammin they did it on, it's in the corr section though. I wonder if I could just get some different bearings to stuff the bigg axles in there so I dont have to shell out for cvd's.