Saint wrote:
Now I just need to fathom out how to fit one! All part of the fun
and I am learning all the time.

Get remover tool from LBS or:
http://www.mwdyason.ltd.uk/shop.asp?..._company=TOOLS

Instructions for the most common type of cranks:
www.parktool.com/repair_help/FAQrCarm.shtml

It'll be well worth removing and refitting the existing cranks yourself
before replacing them. Grease the spindle* (and bolts) and get cranks
nice and tight. You might do a better job than the bike shops, seriously.
Don't forget that you're not just tightening a bolt but actually wedging
the crank up the spindle so quite some force is needed (but don't go
completely bonkers on it!). You might also need considerable force on the
tool to remove - use a wrench or large adjustable spanner on tool if
necessary.

Also check chainring bolts are tight; grease pedal threads and tighten,
keep on trying to eliminate things.

* Opposite to standard practice but it works for me and is advocated by
Jobst Brandt:
http://draco.acs.uci.edu/rbfaq/FAQ/index.html - 8f

~PB