So I just got a chance to brew in my modified keggle with Weldlessfittings.com stainless valve and dip tube with swagelok. Had no problems using a cheap step drill to install the valve and the diptube fit perfectly. I was amazed at how easily everything went together and how good it looked and worked.
I brewed an Old Speckled Hen clone (thanks Orfy) last night with no issues from the valve. When I went to drain into a fermenter it couldn't have been easier, just open the valve and watch the beautiful liquid drain through the hose into the BB. You have to understand I have been using my auto siphon rack from bk to fermenter. This is is a huge step up.
I can't say enough about Weldlessfittings.com! The price was right for all stainless parts and the service was quick and courteous. Dave was great and a supporter of HBT. I can't wait to put my sight tube on. If you are in the market for weldless stuff... weldlessfittings.com.