I'm not sure if Tren would help an Ectomorph put on alot of mass, but I woudl think it would add some mass.... Tren is a great drug for quality gains, ones that aren't too hard to keep either... If you wanna gain tons of mass that an Ecto will just lose after stopping, then Deca/Dbol is the way to go.... However, if you are interested in keeping your gains, I would think Tren would be a good option for an Ectomorph.... It's worth a shot at least....
As for the sides, I have prob used Tren more then any other AAS out there, and I never get any sides from it.... Other then the aggression, and lower sex drive that is.... As for the whole Kidney issue, there is no evidence to support that claim.... I don't know why guys are so focused on the Kidney issue when there are no studies to back this up.... I just take some Cranberry extract, and drink tons of water just in case it is toxic to the kidneys, but I have NEVER had brown urine or any Kidney problems I know about.... The drug is amazing in that it gives me (Endo/Mesomorphic) great LBM gains that I can keep when i come off.... To me, that is the most important thing I want from taking steroids, so Tren is the best option for me....
rizz