Actually, I already did. One glaring fault of the TL tie down system, besides the angle of attachment is the fact that on a 6.5 foot bed, the tie down (from the camper anchor point to the tie down plate), crosses directly in front of the fuel filler door, making fueling the truck difficult without removing that tie down every time. TL uses existing frame holes to locate the tie down receiver, so it locates the tie down receiver too far back and subsequently the tie down (from the camper anchor to the tie down extension is way too vertical.
I've already e-mailed them about the situation and followed up with a phone call to their head of marketing in Kent, Washington. I've done some new product R&D for them this summer so I'm in contact with them regularly.
If you have the standard steel ends, it's really a matter of welding on a length of 1/4" x 4" x the appropriate length of mild steel plate (HR) and drilling a hole in the far end to accept the lower end of the Fast Gun or Qwik Load or whatever tie down you use and / or making it asthetically pleasing with an angle grinder.
If you have the aluminum end, the the addition of the steel plate will require isolation from the aluminum with hard nylon washers and stainless bolts or you can TIG on an aluminum plate of appropriate thickness. With the guy who bought my Lance, I went with the composite approach (steel / aluminum) because I wasn't in the mood to stack dimes.
Way off thread, but I feel your pain of a sliding TC because the tie down angle is not sufficient to secure the camper and it don't matter if you have a rubber mat or not, she's gonna slide back until the tie down angle snubs the rearward movement.
Should probably start a new thread about it actually.
None of what I state is to demean TL in any way. I think they manufacture some outstanding products. In this case it just needs some fine tuning.....
Unlike the Fantastic Fan motor fiasco which needs more than fine tuning. That needs a new supplier of motors that are quality built and now the lowest price available. The Fantastic fan unit isn't cheap to purchase so there is no reason to skimp on quality parts and assemblies other than outright greed.