I'm still trying to learn things about my planer....

I need to plane some poplar down by no more than 1/32". However, the boards
are already cut to length and have tenons on the ends. (Don't ask)

I really want to avoid any snipe on these boards so I'm thinking of using
the Sacrificial Board technique. Here's my idea:

Cut a groove in the sacrificial board, insert the tenons in the groove, and
run it all through the planer. With the setup shown below, I can easily run
4 boards through at one time. (I'm only showing 2 in this example) My only
concern is that the sacrificial board(s) will be planed cross grain.

https://i.imgur.com/s3bxz1G.jpg

From a safety perspective, is there any reason I shouldn't try this?

Yes, I know I could do the same thing with a sacrificial board running
with the grain, but I'm sure this question will start an interesting
discussion, as usual.