Allow me to correct describe the situation. The F17 carbon mast has been replaced and over the years there have efforts to do the same with the I-20 mast. However, the latter is NOT a done-deal at this time.

In Europe I've seen only a handful of alu masted I-20's, but these were all try-outs as far as I can determine. It is common knowlegde however that the I-20 carbon masts are ludicrously expensive to replace when broken. Luckily they hardly ever break. Quotes seem to run well above 5000 bucks both in US$ and Euro's. I seem to remember quotes around 7000 bucks even, but that is from memory. I'm not sure why the retail prices are such.

Wouter