Yep, with Prophet here.
Used Magic Sculp for years now, can buy 1lb for £10. also just got some Apoxie Sculpt, but not tried it in vengence yet. Very happy with mixing GS and MS in various proportions
MS has some good advantages for making solid angular shapes; the Shoulder pad and neck armour on my Inquisitor bust were made by rolling out the slightly cured MS to the desired thickness, and when its getting firm but not solid, bending to shape and keeping it there until it dries rock solid; can then be filed and sanded smooth. Now I couldn\'t do that with GS