Some arm progress

After some helpful discussions on WhiteArmor.Net, I had some better ideas on what needs to be done to the fore arms.  The ATA arms are known to be very wide.  There's a rectangular ridge (mold line) and now I know what needs to be trimmed away...

With that knowledge, I trimmed away the inside of the right arm...

The item on the right has been trimmed down as well as the "returns" still present on the opening of the other part on left.