Originally Posted by
wphamilton
You might be right - I'm worried about lateral wobbling if it's not perfect or the chain line isn't precise, putting stress at the end and pvc having a bad reputation about that ... could be nothing though.
Price is right. If it doesn't work you can always spend the money for a commercial spacer set but part of the fun of this kind of project is doing it without spending any money. I'd also use one of my current chainrings and the existing chain. The cheap, dirty solution, of course, is to just leave the unused cogs in place.