I actually did take a peak and you’re right, the craftmanship is amazing even at twice the price. I will try to get some pictures up later if I find some time.
I am not sure how this theory came about and if it is true. The Ortofon Club mkII which is specifically designed for this type of arms comes in at 18.5gr (the cartridge is the headshell too). This is how much I found the [headshell + DL-103 + tightening screws] to be after weighing. I think most confusions arise from the fact that Denon reports compliance at 100 Hz to be 5 x 10-6 cm/dyne. At 10Hz this is more like 12 x 10-6 cm/dyne.
Are you sure dynamic compliance at 10hz is 12? ... That is 2.4 x higher than 5 cm/dyne ... normally 1.7 - 2.0 times is used. With 9 - 10 cm/dyne is almost in the "red zone" for a medium mass tonearm.
If you don't see "woofer pumping" must be reasonable, but ... check it out. Maybe you're using a subsonic filter.