Cool! sounds good! Nice one with the 'special brew' they can take a bit more time to mix but you can get some really good results.badges2nz wrote: Hey oota, yes that's what I'll be up to, I have found a company in Wellington, trig instruments that sells the mold making rubber at a reasonable cost, then I'll cast the rifles out of my own special mix that I am in the development stage of.
Box molds will be the easiest option for me at the moment but it's trying to keep the amount of wasted space down so as not to go crazy on the casting rubber.
I like the method you have used for some of your rifle builds in the past, that's what I'm especially interested in when I do come for a visit to see how you have make the supports etc for them.
I agree you've got to be frugal on the silicone when you self-funding. A rule of thumb I use is roughly 10mm of rubber all the way around the edge of the master. Depending on how tall your boxes are you may want to go wider. Also the thinner the silicone gets the less resilience it has so it's definitely a balancing act if you want to run the mold more than a few times.