Nice CG! I tried mapping & drilling by hand (at first) but found a manufactured paper product that featured
the hole size & spacing that I felt this project needed for ease of casting.
The older I get & the more affordable CG & rapid printing (growing) parts becomes, the more excited I get.
Again, very nice CG work & as F A S T as you drew it,
...paying an hourly rate for a CGI Craftsman isn't the budget Killer that it had been in the past!