cutcopypaste - many thanks for the tutorial. I can't wait to try it out, but can't just yet. I will tomorrow. I'll let you know how it goes. Too bad about the booleans tho, my project is architectural in nature and therefore chockfull of candidates for using that technique. I've never tried the method you just explained (brand new to RD) but it looks like it might work for me for most circumstances anyway. Thanks again.