No problem at all, I'm only happy to pass on what I can as many of the guys here, Vern, Jesse, Mathias, Dennis to name a few, did for me its these guys who really know their stuff on here IMO.
The first rail the wider one and one of the smaller ones I have drilled at the end. I plan to tap the sight so I can fix the rail securely possibly with an Alan bolt:
The second of the smaller rails I've not had to, I don't hang it upside down though either (it will move, due to the weight).
I wish in part I'd not drilled the larger rail, it fits incredibly snug, and with the bend holding it in place at the front, it can actually hold upside down.
The thinner rails bend causes it to spring so has to be secured.
Here are a couple of shots with one of the M38 (no7) scopes this one is the 1942 model. I think its better suited to the Hengstler.
I'm going to make myself another bracket when I can spare the time between new projects.