I would run half of the rows with the Curvetine on the right, half with the Curvetine on the left side of the seed just to avoid any chance of pulling one way or the other, as remote as that might seem with closing wheels.

Please leave one end row with two rubber tires and the other end row with two Curvetines run at a lighter spring setting than the other rows. This way when you turn you will have two rows together to compare no Curvetines, most rows with one Curvetine and two rows together with two Curvetines. This will give you some first hand experience with two vs one and what one is doing for you compared to two stock rubber. I'll bet you see a visible emergence difference in many spots in the field if not all.

One of our goals with the Curvetine is to provide a closing wheel that works well in a variety of tillage systems. Few people want to go changing closing wheels on a 24 row planter when they do the worked headlands, etc! A point to keep in mind is that Curvetines have intermittent and less ground contact area than a smooth rubber tire and do not require near as much down force as the stock rubber tires. This also reduces tailpiece pivot wear, etc.

The new 1202 version of our Curvetine should last on a par with our Trashwheels. Hub bearing arrangement is the same except has a regreasable cap with protected zerk left in. We grease Curvetines more often that Trashwheels, more to purge dirt than lube the bearings. Closing wheels are in a bit of a different environment than row cleaners.

Thanks for the kind words.  Merry Christmas.

Jim at Dawn