Ironwood=$130 plus shipping+cost of hardware+time and $ to stain wood.
Timbersmith=$125 shipped, includes all hardware, already stained.
From what I am seeing on various internet webpages, I have to do alittle filing on the timbersmith due to the MAK 90 having a 1.5mm receiver. The only PITA part will be the hanguard. Will need to do some sanding on the inside to make it fit. Got my dremel ready.