If you don't have one and want one the 18" high velocity floor fan is down from £50 to £30 at screw fix in the summer sale
Have you seen these on offer for screwing ply http://www.amazon.co.uk/Ryobi-ESD-6...27WW/ref=sr_1_1?ie=UTF8&qid=1337107511&sr=8-1
I suppose it Would depend on the type of screws you use I'll let you know Ive ordered one for the sake of £40 it may be a good buy if not you will see it on eBay I've used the makita ones there a good tool hopefully these are the same quality
Used it yesterday yes it countersinks you can adjust the depth and comes with a Philips bit and a square bit and 110v so ok for site work as well not as quick as compressor and pinner but quicker than screwing by hand for a good fixing
I "borrowed" some screws from stepdads company just to see what it works like got to get hold of mate whos fastner company do them and see it he can get me a better rate than screw fix will find out this week