Thanks Mike for the info on the HW 97 and foam not working. Hopefully Timmy has some neoprene rubber left. I'll contact him.
Foams come in numerous densities so the high density/closed cell would be the best. The slow recovery type is the liner they often use in High end audio speaker cabinets to make them sound non-resonating. That is what I have. My Best friend does Surround sound systems/Home theater so he has bales of this stuff precut for various applications. He gave me enough to last till the next century. That is why I'm giving it away for a few dollars of postage. I'll never run out so don't ask me if I still have some. The answer will be don't ask, just do it.
Send a SASE (Large Envelope) with $2 on it to Mac1 AG /Sticky Bed 13974 Van Ness Ave. Gardena CA 90249-2900
I will send a few ounces of the sticky back insulation/soundproofing material (enough to do several large springers).
On HW and RWS rifles (including the numerous clones) with 5MMX.8 Metric stock fasteners I recommend the Mac1 Cup Kit (On Special now).
If you buy a Cup Kit just Mention Sticky Bed in your order notes and I will add a bunch of the soft bedding Material to your order for free.http://www.mac1airgunshop.com/mac1-forearm-cup-kit-p/mcupkit.htm
Thanks for the Business and have a Happy Holiday.