Didnt know about them John to be honest...... Also Mike said he hardly uses his, also screws cost more then the nails. Mike also said the lowest screw is 25 mm so if doin 6mm ply on 18mm floorboards you will go through and could hit a wire or pipe.
Think I might bite the bullet and invest in one like you've got Daz........unless of course you've finished with yours!! Did you get it direct from Spotnails and do they give a discount to forum members?