The dremel is a godsend. I personally use a different tool. I have a
Spiracut by Bosch This has high rpms on it.. and is quite powerful compared to the Dremels I have seen. I place the dremel disc insert into the unit and can cut much faster and cleaner.
Did you ever have your dremel stop or slow down while you cut? You WONT have this problem with this spiracut. The unit practically jumps out of your hand when you turn it on.