I thought about that but I wanted everything to be the same.

If you look at the speaker straight on then the 2 stabilizers are in line. If you look at it from the side the one in the back looks longer. I just wanted to get the spikes as far out as possible to get them as sturdy as possible. I'm not sure if having a shorter one in back would affect this or not?

On the website, they give detailed measurements of everything for the outrigger. I just figured they would fit the 60's and didn't measure the 60's as I knew these were the cheapest to find and I would make do.

From a quick look comparing the speakers the towers are all 9.25" wide...

High Gloss Cherry
M60 VP150 QS8
Open for Auditions but please don't drool on the High Gloss