Guys i have reading many of your posts about air buble problems when casting resin. I think I may have a solution without having to vaccume. I used to do a lot of concrete molds for counter tops and what we would do is make a vibrating table. The vibration causes any air to come to the top and escape the mold. Now these tables where quite large but with 1/24 25 scale you could use almost anything that vibrates, even some of your wifes or girl friends toys Hand sanders would most likely be best. Just a thought, trying to give back hope this helps someone out there.