I save an OEM class I hitch with a short tube. the set pin hole is near the entrance of the tube. looking for a sturdy rack that inserts it's tongue well into the tube but can still use this set pin hole which is so close to the entrance. any suggestions? I prefer not to use a rack whose tongue inserts just a couple inches and which does not take advantage of the full length of hitch tube. I hope that isn't too confusing. my Subaru dealer says i can use a 4 bike rack, but some I've seen have their set pin at the tip of their tongue and leave the remainder of the hitch tube empty. doesn't seem so solid to me.