Thanks for the replies guys, much appreciated. As usual this forum is a wealth of helpful people happy to pass on advice.
I think practice is the key before buying quad sticks as plenty of people use normal stick effectively. I was planning on setting up in the spare bedroom as you mention goathunter with a crack in the curtains so I can focus on something at about 100m.
My 4 sticks cost less than £10 to make. A spare set is off to a DSC 1 shooting test this weekend. 4 sticks were a revelation to me when I was shown them some 10+ years ago. I use the 4 sticks usually as 4 sticks, but sometimes as twin sticks and very occasionally as a single stick. As the photo of another Forum member demonstrates, old dogs can learn new tricks, and 4 sticks is one of the best I've learnt this century.
Good luck.
JCS