Thanks for the info Ewan- I'll go and see if my local B&Q has any left.
I already have a clamp so that's no problem- I definitely don't like the thought of using a Dremel or similar on a mini I'm holding!
As for heat, I find that minis heat up even when I'm just using the razor saw which Khaine and Deathwing suggested- is this normal or do I just have a very good wrist action?!?
For the record, I've now managed to convert four mummies using the razor saw by chopping the arms off the fanatic Khemri mummies and replacing them with the arms of the Ramtut Star player mini- they now have more 'width' and look much bulkier and imposing. I've also beheaded them and then re-attached their heads so they look straight forward and not off to the side as they were. When I get them painted I'll try to post a picture if I can lend a digital camera from someone and figure out how to get the pics here (technology isn't my strong suit- a razor saw is about my level!

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Tomba