Yup I love my dr, I had pug, then hobbit, now the vespa..
I didn't do any chamfering or crap. Just the port matching as above, and making a new gasket. Good mid range power and very quiet too, good quality in those dr's
I did think that, when doing the case matching, the one transfer got pretty close to the edge of the sealing surface, I kept that one back in a bit.