you didnt test the magnum on temp?
and things i noticed is that your mwbc blocks almost have the the same flowrate and same difference as with 2 pumps
M&B little less flow
and magnum bit more less.
can that be that these blocks use other fittings that the mwbc blocks? or just because of the design?
and that there is much difference in temp of the M&B blocks 7-9 degrees. i thought that would be less.
and ofcourse nice test
it can help people who make there own blocks to see what some things effect. and ofcourse nice for you too see that your block works pretty nice
keep up the work
and hope see more things like this. because all what matters are pics and data
(sorry for some bad english
)