[racingdwarf]

dremmel works well with a choice of bits, take care tho or you melt the lexan, If not a sharp hobby knife, score the lines a few times then with pliers you should be able to break the peice out leaving a nice crisp clean edge. Oh but be very carefull not to slip or at worst you will have a finger off or at best leave a score line and the shell is sure to split along that line when in use