I am guessing the front mount at 2.5" is straight back correct? I would be interested to see some better pictures of your set up. I was under the impression the 141" track was 3.0 pitch . The 136" is a 2.52 pitch I thought drivers would have to be changed.
Thanks
I relocated the front holes back 2 inches and down 1 inch. I think I could have gone 2 inches. The track I have is a Kimpex Sherpaw. I did not have time to drag the sled out of the storage unit to take additional pictures but will do so in the future.