I've captured reported weights for some time now and as of now my very limited data base shows:
w/o outliers w/o outliers
Model KF4 KF5 KF5 KF6 SS7 SS7
average 676 841 820 906 836 827
Max 793 1,013 890 906 963 878
min 560 777 777 906 736 763
sigma 76 69 35 0 56 33
count 5 9 8 1 19 16
The columns labels "w/o outliers" represent me taking out variants caused by what could be "scale dreaming" and heavy engine choices but still only makes a 9 pound difference for the SS7.
BTW - when I converted to TK-1 shocks (only, not their gear) it cost 8 pounds.