The tail boom has been moved lower, so that it is inline with engine thrust line. This gives about 1.6cm of clearance (measuring it always assuming the rotor is fully tilted back 8º).
I'm thinking of lowering the winglet, as the main gear is 8cm long, and it should be 1.5 or 2mm thick piano wire (I fear it would bend too much), but I like where it is now.
Lizard, could you tell me which things would you like to know? I think it'll be easier this way!

Regards,

Juan