That helps but I am still looking to figure out if I can use this Husqvarna roller guide:
www.baileysonline.com/Chainsaw-Chain/Files-Filing-Accessories/Chain-Filing-Guides/Husqvarna-Filing-Guides/Husqvarna-Filing-Kit-for-3-8-Low-Profile-Mini-Pitch-Chainsaw-Chain-531300080.axd
How is it that this kit works with these chains:
61PMN, 61PMMC3, 61PM1 and 90SG, 43RG, N4C, N4C-BL
but not with
90PX
even though this page:
www.baileysonline.com/Pages/Chainsaw-Chain-Cross-Reference-Chart/
lists them as the same chain?
Is there really something that makes the 90PX different from all the others?