Re: Aluminum or Steel
Venice, This is only my opinion but I always opt for the steel frames, especially chrome moly. It is thin, light weight, and very strong steel tubing. Alot of your mid range older Mt. bikes have these frames and can be found very reasonable on craigslist.
If you are set on building with a Felt Aluminum frame, it will work fine but I wouldn't drill any holes in it and you won't be able to clamp to it very tight or you will crush the thin wall tubing.