Good morning, Hi Cobalt, yes I have recently invested in a selection of more aggressive Burrs in the 3mm shank range, I purchased some in the 6mm shank range when I got the Axminster power carver,
I use the smaller shank ones both in the Axminster and the Dremmel and are super for roughing out.
I must also stress the need to wear a leather apron and glove if holding the wood in hand as these burrs can grab clothing and skin, and this is speaking from expierence, when I first started using the Axminster it grabbed my clothing and in an instant wrapped it round the bit and the inbuilt safety function kicked in ie. the flexi drive inner shaft broke thus stopping drive so that cost me a new drive inner shaft, I now carry a spare for any future accidents.
A n adjacent dust extractor is also an advantage with these type of burrs as they remove material at a good rate and the workshop can covered in dust in an instant, I initially used an old Dyson vac with one of the end attachments mounted through a piece of wood clamped to the bench top so that the inlet was between me and the burr, it worked well.
FYI I purchased Sabbur tooth burrs from Woodworks Craft Supplies as I have dealt with them before and thier pricing is very competitive, link below
http://www.woodworkscraftsupplies.co.uk/saburrtooth-burrs-discs-wheel-c-482.html?osCsid=uid2e4gonae3v1571dgd2bhul7