Brushcutter

Do you not have a guide bar roller tool for squishing the rails back together. A tool I've only ever seen and don't have myself.

A bench belt sander is also really good for dressing bars. At least short ones.

Any tractor dealership mechanic should be able to do it. Basic service isn't too hard to do yourself. If you have a fuel problem and you use the machine infrequently it's most likely water in the fuel or crap in the fuel hose.

I tend to use fancy guildbars that are so hard they don't burr easily. They need a diamond to get close to dressing them. On the standard bars I use the dressing tool all the time. I really rate it. I've got a vlorbe one, does a great level and being able to put a consistent 45 bevel on the rail edge is nice.

That is a good price for a square file. You need to clear that gullet out a little bit more for that to clear better. Is that filed inside to out or outside to in? Looks like the second angle face isn't quite right. I'm still at the rough job on square filing myself. I found it easier to get some 75CJ chain from Oregon and sharpen that by copying what was there.

I got a quote for insurance on a pickup the other week. As I hope to move soon I used the same vehicle different postcodes. The difference was a grand so that plays a huge part in the cost. My insurance is currently about 1200 quid up from about 900. Luckily for the economy uninsured drivers keep crashing into cars in the area driving up the cost of the insurance because of the risk. London bubble for you.

Chain boxes

If you want to spend some money then the chain locker is cool. If you want to spend less money Stihl do a little plastic chain box. As I'm tight. Used take away cartons is what I store mine in. Washed first obviously as one isn't a savage.

Practice holding the saw level. Would you put a pint on it? Quite often people get the bar level end to end but not side to side so it cuts up or down hill. Saw on the side use you thumb on the trigger helps reduce fatigue and keeps the saw level. Bend down get close to the work and it all works better. Take your time go step by step and don't rush. If you scarf isn't right change it. Got a Dutchman correct it. Draw it all in crayon on the tree if it helps. Use a stick to help say parallel with the undercut to make a nice hinge. If you can get your body at 90 degrees to the direction of fell and your leg in line with the hinge things will be easy. Did I mention don't panic. Listen and learn practice. Take mental notes track your progress. You will get better..

Do you have a supplier?

I think on the 530 it has a nipple in the UJ and on the 540 on the flat face. Of the joint between the two yokes.

The shafts that go from the common gearbox to the roller. They are on the top of the UJ. You need a 90 degree grease connector most of the time as the chances of the shaft stopping with the nipple accessable from the top of side are small.

Cheffins sells a bit. Seen a few roof mounts go through over the years. Occasional trailer and saw bench. Sometimes it sells some of it sits around then goes. Lots of places sell second hand forestry kit. Those looking for it tend to find it.

Can you - yes. Should you - probably not I cant see why undoing them at that the low torque they are at would hurt with an impact. Doing them up with an impact is a big no no.