Re: rubber drive roller or steel?
When I built mine I did a lot of reading on this forum. It seems that by and large the steel is the best all around. I have about 375 miles on mine and it appears that the tire will last in excess of 1000 miles. I have very little slippage. I use a heavy spring for tension and and have a small turnbuckle for fine tuning.
All times wasted wots not spent ridin. Get a bicycle. You will not regret it. If you live. Mark Twain