Fred,

I have a KLM 2M-14C that I am re-building due to sun damage and failure of the center insulators for the dipoles.

The length overall (outside of tube to outside of tube) of the folded dipole is 915mm. The outside width (outside of tube to outside of tube) is 58mm. The spacing of the center screws is as you mentioned - 49mm.

Hope this helps.

73-Larry K4OZS