[modelman]

Cooper-what you have so far looks really good. On molding, any imperfection in the tire will show up in the mold and on the molded part. But it is just a "dump truck tire" so I wouldn't be too concerned. The building technique you described is similar to what I did but I found by pouring the complete tire there will be problems with air. I even used a shaker table and still could not get all the air out but it was very minor and I turned that to the inside. The way I described the half mold idea will eliminate the air problem but I am sure you will work it out. Keep working!!