Tried some templates today and think i will make a wooden mock up first [ Guests cannot view attachments ]
You will see that model H has a longer bonnet/hood which will really suit my boiler want to increase it to 1 1/8" dia where as Model M seems to have a higher cab [ Guests cannot view attachments ] [ Guests cannot view attachments ] Size wise frame is 185 x 64mm --1/ 4 x 1/4 x 1/16" Wheels are 2" Wheel base 5 3/4" don`t know it that will stand as a mini car
Like the French say you have to learn to walk before you can run