Space Hopper help needed

I know there are a ton of Cox collectors out there, so I am asking for your help in identifying an early version of the 1st run of Space Hoppers.

When we were at Cox, Dale Kirn told us the Space Hopper was originally planned to be a ball bearing type, similar to the Olympic, and used the same porting scheme as the Oly and later TD .049 ( 2 side flutes). Dale said the development of the side flutes, and extruded crankcase, along with the beam mounting and no spray bar carb were all developed prior to the TD series. These innovations, according to Dale, were both tried but ultimately not produced in large quantities, only small runs were made. Apparently due to the design of the reed valve, the engine was only capable of so much power, and the ball bearing only increased weight and cost. Dale said that the side fluted cylinder however was used in some the first batch of Space Hoppers, but was not stamped #4 like later TD .049s.

When Bill Atwood came on board, the Space Bug was re-vamped into the TD .049 and Bill retained the extruded, beam mount crankcase concept but replaced the rear reed intake with a front rotary valve arrangement. He also retained the Space Hopper style carb (no spray bar) and the twin side fluted cylinder. It was at this point that the TD 049 cylinders were stamped #4 .

According to Dale, the bulk of Space Hoppers were fitted with #2 style cylinders because the twin side flute version was better utilized on the TD version. But Dale said there were some of the 1st run Space Hoppers with twin side fluted cylinders produced that had no marking on the base of the cylinder.

I have looked for years, and so did Dale, but there were not very many Space Hoppers made, so we were never able to positively identify one. If anybody has a Space Hopper .049 with no number on the cylinder, but TD style twin side flutes, I would really appreciate it if you could post pictures.
Thanks