I just received a Bachman 1:20.3 Forney inside frame locomotive.  As with my two other  Spectrum 1:20.3 engines, it's impressive.  I had, however, read a review that criticized the position of the pistons as being too high...claiming a serious design flaw.  I have done some research, looking at photographs from the late 19th century and detailed engravings from engineering magazines of that period and I found many locomotives, particularly Forney types, to have the piston rods clearly above the center line of the drive wheel axles.  I would like to know if this issue has come up on this forum before and what the opinion is from Bachman.
Thank you. 
blcbn