I was wondering if any knows if the holes in the tunnel are in the same spot on a regular f7 as they are on a f7 ext. I was thinking bout going and buying a f7 ext skid and putting it under my regular f7 and then just extending the tunnel! If any has any information on this or input on what i should do it would be apreciated. I want to have a 144 one way or another and i was thinking that if i could just buy a 144 skid that it would make life easier! Thanks for any help!