SithLord7768...you do have a nice lid and you should be very proud of it. I'm glad that Manuel's helmets now have a thicker coat of paint as that was a major issue with is earlier lids. As far as it it being a screen accurate ROTS lid...sorry, it's not. It's a slightly cleaned up ROTJ lid as evidenced by the mouth droop, which has been tightened up, but not eliminated. Also you can still see evidence of the neck flare...which is less pronounced with the elongated neckline..but it's still there.
You're right, it seems like a better value if you are after a fully detailed reveal. However, the MR is cast straight from the source at LFL...you really can't get a better pedigree than that. Also if you match a screen cap of the screen ROTS and the MR lids...they match up exactly...while the Portumac lid has different details.
Also, to get the smooth finish on the interior of the dome, a seperate silicone jacket was used to smooth out the interior of the dome flaps (check the Making Of Vader featurette in the box set, it can be clearly seen there)....so this adds cost in terms of labour and materials...and another detail that the Portumac lid doesn't have. The neckseal...although you can't see it on screen..I suspect that that was the neckseal that was worn by Hayden in every other shot except the operating table scene.
At the end of the day tho, you have a great helmet with a lot of detail...so be happy with it. It's just when you take a cheap shot at MR, in good humour or not, which is making a truly screen accurate ROTS Vader lid....that's when people get testy....and yes,MR has had their QC issues...but I'm sure that even those issues will be corrected soon. Even with my rants lately with the MR QC issues....I'm very much looking forward to getting my lid.