I have my Longhorn Gold1 tracking at 1.6 grams. I find that setting the VTA or better yet the SRA to 92 degrees may help with some transients. I have asked Grado about this and they also recommend the 2 degree tip forward. This will mean about a 8 mm increase in tonearm height after paralleling the arm. Unfortunately, the SL1200 will only go up 6mm, but I think it's close enough. Depending on what mat you use, this value will also vary from user to user. Try it if you'd like.
I also am setting the alignment with an overhang of 18.282mm, instead of the 15mm. I am aligning to the Lofgren B curve, so the null points will be at 70.285 and 116.604 respectively. With overhang set at 15mm, the first null point is in the label area. While this is OK, the distortion curve goes way up at the lead-in and adjusting for the Lofgren B reduces that lead-in distortion (but it also raises the run out distortion, but the average is much lower, overall.
Regards
Wayner,
Longhorn products
Audio by Van Alstine