We are on a 4-38" system using a M2 with black-bottom, orange stripe header. I would like to move to a narrow row system. Question n1: Is the frame of our 4-38 long enough to shove everything together to make a 6-28" headerIJ We already own this 4 row head and other 4 rows are much cheaper to purchase than trading for a 6 row. I have more time and mechanical abilities than money, that is why I'm considering this. Question n2: How narrow a row spacing is possible with the black row unitsIJ When pushed together to 28" can you eliminate the short coupler shaft between rowsIJ Question n3: Does the new silver poly available for the huggers fit the older black headsIJ Thanks for the help. BTW -- I'm also looking for two row units, no-til coulters and double disk fert openers for a Deutz 385 planter...