Wings all you do at the servo ends is use the threaded rod on the end of the sullivan cables and add a 3 rd rod to the two the third rod of course goes to the servo I used 2 wheel collars to clamp up all the rods together I got the idea from a vmar ARF I had that used the same setup with 2mm pushrods thru tubes works great it was overkill but I epoxied the rods to the wheel collars if they really
good and tight really not needed could also ca to fil the gaps \
I think the rod and sideplate thing came for Central hobbies not cheap $30 the sullivan rods are cheaper as you say and a lot
quicker to install
I really do not like the "free floating push rods connected from the servos to the horns on any plane ALL MINE were changed
to rods in tubes (of course most do not have a split elevator) you can anchor down the tubes at both ends and a former half way back
NO SLOP OR BENDING