I just placed an order for a CS600 Tyrolean Style Sporter stock for my HW77. I plan on taking the factory stock from it and installing on my HW97kt as I am not liking the thumbhole stock,especially the aesthetics that well, and have always wanted a Tyrolean style stocked rifle.
I think the Tyrolean stocks were designed for shooting standing, and yes this gun will have diopters only. I removed the fixed factory post and installed an Anschutz globe and rear diopter along with a Gehmann adjustable iris. I find the adjustable iris great. I can adjust it for a finer picture in bright light and or a target with a lot of contrast, or open it up for low light conditions.