What type of bits did you use? I used a specially thinned type designed
specifically for low powered SDS drills. These can't be made so deep, so
you
keep having to withdraw to empty the bit. However, the can sides and
blades
are thin, so don't have to remove so much material, keeping the drill load
down.

Not sure - same design as the one on the pic, but that's the 117mm one.
They were quite heavy and probably about 150mm long - had an extension bar
thing too, which was a right pain in the arse. What's the reasoning behind
the 'friction fit' SDS-plus bits?

Andy