I have a DeWalt DW621 router that is about 6 years old. Not as variable speed model. I have become increasingly unhappy with it. I never did like having the plunge lock work by twisting the handle. Very easy to tip the router while adjusting the depth of cut. It also does not easily lend itself to gradually ( say 1/8" at a time) increasing depth. Now the plunge mechanism has started to slip on me, so after making 2 or 3 1/2" deep cuts, the next one may go to 5/8" or even more. Bummer.
Anyway, is there a modification that can be performed or some way to better control this beast?