Bear with me here, as I am sure the initial answer is plow plane. But I am not sure it is the right one.....
If you were to buy a plane for making grooves and the like, how would a tongue and groove plane fare? I realize that it is not adjustable, but how often do you make grooves that are wider than 1/4" or are inset from an edge all that far? I ask because I find the handle on the Lee Valley plow to be a misery inducing torture device, whereas the handle on LN's tongue and grove plane is much more comfortable. I admit that I prefer it's simplicity as well.
I can use the LV plow in a pulling motion, but that is less than optimal, although it works fine that way for me, I can see it becoming awkward after a few grooves, and I think the chances of screwing up the wall of a groove would increase with the number of grooves you make.
I realize this may very well be a very personal preference, and the sheer utility and adjustability of the LV plow makes it a very desirable choice, but the handle really does mess with my poor, damaged hand.
Thoughts on this admittedly bizarre question?
thanks,