Radiantrim and three column Peerless dilemma

Daniel_3

After many improvements to my steam one-pipe system I have come to the last issue with two rads. The room on the left is a master batch with a 5 section A&R co. radiantrim which is not recommended for one pipe steam. The room on the right is a bedroom with a 7 section three column plain peerless. Some knuckhead tied 3/4 copper right after 1 1/4" elbow at the end of the run-out in the leftmost bedroom for the radiantrim and during renovation of the master bath drilled through the joists about 6 feet to just beneath the baseboard to connect up to the radiantrim beyond a new shower and tub. It looks like they drilled and tapped into the 1 1/4", no fittings used save for a male/female adapter. The rad in the left bedroom is on the adjacent wall to the master bathroom.

After a considerable amount of time I finally figured this out after counting the risers and removing the angle valve for the Peerless and peaking below to find where it ties in. Even with double venting on the peerless (no problem getting the whole rad hot) and a heat-timer on the radiantrim the radiantrim just doesn't do the job in that bathroom. I would like to rip it out without causing much damage below. This is on the second floor above the front foyer. Am I forced to remove sheetrock around the foyer to install a new run-out of 1 1/4" and a new rad in the bathroom? I hate the radiantrim since it's making trouble for the peerless. If I don't double vent then the peerless stays cold and if at all it short circuits.

What would you guys do?

Daniel_3

Here's a drawing.

Daniel_3

No thoughts?

kpc_10

why not...

just install a small radiator.

Daniel_3

Would that do better since the air content of the radiantrim is much higher than a small rad?