[Pastor]

I'm here, just been waiting for more input. A 16mm hole will handle up to 20mm bands no worries but I personally would worry with just 22mm of gun thickness. With even a 7mm recessed track there will have to be a derlin track which would be say 10mm deep? That only leaves 5mm in the centreline of the gun. Not a problem probably if the centreline was 22mm + 7 or 8mm for the recess (still less than the average euro pipe gun) as the main strength would be in the sides of the gun but still something to consider. Also with a derlin track we need to consider where exactly the hole for the bands will be drilled.

You know this is going to be an awesome gun!