Yep he's had personal one on one instruction on every engine he borrows (we steam them numerous times together).....its just one of those things, he's learning and things are going to happen.
He proudly showed me blisters that he's given himself today when he came over for a swim.
@Bruce .....Bruce he put together the Christmas stocking filler today (it's been a super busy and hot Christmas holidays...kids get 7 weeks off school) that you bought for your Grandchildren and posted in thread today and my son just sent this pic to me

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