I have recently added a plug in pylon to my K8b, much modified from the Phoenix artf so I can fly without a tug or big hill
Pylon follows all the rules of shedology using parts from the bits box and produces 5000 watts on 12 s lipos using a carbon heli blade for the pylon mount , a cardboard tube for the nacelle and a Mc flurry drink lid at one end and a cut down 4 nch spinner at the other.
The pylon simply bolts in place with a 4 mm bolt through two small doors in the fuselage top.
The K8 has known issues with the inner wing panels and I had to add 4 cyparis spars plus ply shear webs to make them suitable for use ,
She weighs in at 35lbs and flys really well but requires a well planned landing pattern ,
cheers Euan.