Yes the DLE 55 will be spot on.
Sorry to hear that you have had so many problems, cant say I have anything to complain about.
Send me the diamieter of both ends and I will check on my spare tube.
Good day DB; I very much appreciate your assistance. The measurements of your spare cylinder will dictate whether I purchase a replacement mount cylinder or enlarge the fuselage opening. The following measurements of the engine mount cylinder were taken with a digital calliper.>>
On the cylinder I have, where the engine bolts on is: 5.140” or 130.5mm or 5 9/64” Dia.>>
The end that inserts into the fuselage is: 5.190” or 131.8mm or 5 13/64” Dia.>>
The fuselage opening that the cylinder inserts into is: 5.123” or 130.1mm or 5 1/8” Dia.>>
As you can see by the measurements of the mount cylinder, the fuselage opening is too smallby 1.7mm or 3/32” diameter to allow insertion of the engine mount cylinder.