I was looking on doing some upgrades to my .325/.063 Stihl 026. I was interested in installing an adjustable oil pump to replace the fixed one. Basicly, I will need to drill an access hole for the adjuster screw through the bottom of the case. It looks pretty straight forward to me, and I found a pump in a kit with a 3/8-7 rim sprocket too, kill two birds with one kit! Anything I'm overlooking on drilling the hole! Once switched to 3/8 (.050), I could not find any stihl bars in 18". There were several other brands available such as oregon and forester, and others, in 18", but in a stihl it looks like its either 16 or 20" in 3/8 (.050). I'm thinking that a 20" is too much bar for that saw, and a 16" would be better in a Stihl. Otherwise maybe the 18" Oregon? Everyone needs to have one bastard saw in their collection!