Art:

1 engine, 5 series, 0 variations on the base model. The real 5 series is 1 engine, 5 series, 2 trike gear variant.

But in this case I think they added the 2 without ever having had a taildragger 150, the 2 was used because everybody expected to see a 2 on a Cessna with training wheels.

Bill

PS: I deliberately ignored your feeble joke. Haw. wr.