Poophead... good questions.
Much more than stock than the stock tunnel... which is what The EZ ride mounts to .. they put a plate on the inside ... I'm sure that custom orders could be handled on a special order basis.
The Holz, timbersled, K mod, Fabcraft mount to the stock location in front...
The rear can be left undrilled.
The 1/4" thick VE tunnel sides with integrated drop brackets are very strong...
This concept would be as strong as any previous VE tunnels and certainly stronger than the stocker that is made of .063 aluminum.
If you are finding that you pack crap loads of gas... upgrade to the Trail tank 15.5 gallon tank... carry a 2.5'r behind that for 18 gallons total... keeps it centralized.
The Cats have weak tunnels to start with... the lightening kit you talk about was a bumper from BDX... it made an already weak tunnel weaker.
The VE design is to increase function, deep snow capability and sure footedness... this kit would continue that tradition.. a pound or so weight saving is a side benefit but not the purpose of a kit like this.
Again... the 1/4" thick tunnel sides are what really adds the strenght... positioned correctly.. the webbing will not detract from the strength.