The other question would be how efficient are they?
In a 21 the rad lay paralelle to the ground and good efficient rad is realy needed.
My standard rad could not get the temperature down during a mapping session in May.
This session was aborded and I could not play with my new toy ☹️ a new shiny set of RB 😬.
Maybe I just should get a Radtec one
Jack
Emily, The Very Yellow 21