Specialty grains only get steeped at about 170F for 30mins, might cool to 160F in the winter over that time (temp barely drops in the summer). The bags I use are the ones that OBK puts in their kits, basically a cotton bag, and haven't had anything come through them yet.
OBK does have Biscuit malt on there (unless they sold out in the last day or so), but it was only whole grain, and not offered as crushed, and they won't do a custom order anymore as it is apparently a PITA to clean out their machine for just one bag.
My thinking was if I can use a coffee grinder, then I can buy the grain whole, and grind what I need, and since the min. I can buy from them is 1lb, I don't really want to buy 1lb of crushed grain, if I only need 2-6oz or so, as obviously whole will last alot longer.