Artar, if you intend to use the Shelter cartridges, I don't think that the Hadcock will be a suitable platform for them. The Shelter cartridges have shown themselves to be quite difficult for unstabilized unipivot tonearms. I concur that for the Hadcock arm, the Music Maker would be better suited.
For the Shelter cartridges(and Koetsu, Denon DL103R, and other MC with <10cu compliance)you truly "need" a quality gimbal bearing arm of at least 11.5g effective mass, or a very capable stabilized unipivot of similar mass or more.
The Morch DP-6 with it's "dual pivot" design, may be stable enough for it, but I never used that combination myself. I do know that you can get a suitable armwand for effective mass matching. I suspect it would be a much better match for the Shelters than the Hadcock.
If you want a Jewel-like tonearm, I may suggest a Triplanar.
Regarding your gain levels, the 80db gain you have in the system should be fine for the Shelters and other 0.4mv output level cartridges.
When you start bringing "looks" into the equation, and thinking that performance may not be affected, you are venturing into very dangerous territory.
For the Shelter cartridges(and Koetsu, Denon DL103R, and other MC with <10cu compliance)you truly "need" a quality gimbal bearing arm of at least 11.5g effective mass, or a very capable stabilized unipivot of similar mass or more.
The Morch DP-6 with it's "dual pivot" design, may be stable enough for it, but I never used that combination myself. I do know that you can get a suitable armwand for effective mass matching. I suspect it would be a much better match for the Shelters than the Hadcock.
If you want a Jewel-like tonearm, I may suggest a Triplanar.
Regarding your gain levels, the 80db gain you have in the system should be fine for the Shelters and other 0.4mv output level cartridges.
When you start bringing "looks" into the equation, and thinking that performance may not be affected, you are venturing into very dangerous territory.