Had the pleasureof havin to use materials supplied by SIG from their liverpool and manchester branches. Boards dont cut at all and are bent coming off the pallet honestly believe they are seconds! And as for the board finish its complete and utter SH*T. You d get a better finish spreading mud. Problem with BG or just the merchants not looking after their stock? All i know is it s us that hav to try and make a good job out of a pile of turd!!!