We know from before that your conditions are quite a bit out of the ordinary for most of us. Your ultra fine dust is not an issue for most of us.
Just remember though Sawtroll when you make comments, as with many other well respected members here people listen. There are also newer Australian members here that listen as well, and to be honest, if they listened to most filtration comments on this forum they would be buying saws equipped with filter setups that they will be disappointed with. This is not just a high rainfall, softwood, forestry forum where people deal only with woodchips the size of their head. I mean I read all the hype here about Husky filtration systems yet both of my 390XP's have to be oiled to keep dust out, and not even dead Redgum but green Casuarina which has monstrous particles compared to Redgum and doesn't even rate on the bad wood radar normally! This is with the HD filter setup too.
I never had any real problems with the filter(s) of my 5100S, but it needs frequent cleaning both inside and outside - a lot more frequent than on the 346xp etc
If you've never had problems with your 5100-S filter but have to frequently clean it on the inside I'd say you do actually have problems?
When my guys have that problem, I tell them to stop and sharpen their chain.
Not that simple in some woods. Sorry to turn this into a filter debate but I've posted a few vids on Youtube with some of our dead hardwoods and have received so many "sharpen your chain" comments it makes me laugh. Even when I've plainly stated it was brand new, out of the box chain
The problem is that they created a bulky and heavy saw that doesn't really fit the purpose of the 50cc class - but it still is 50cc. A 50cc saw should be nimble for use in the woods, not just another "firewood" saw for cutting up logs in the yard - you can just as well use larger saws for that.
We'll wait and see what the 346XP's replacement weighs when Husky goes strato. I think weight and balance between models are highly overrated on 50cc saws - lets be honest, they're all lightweights. My opinion only but if people think a few ounces are going to ruin their day they probably shouldn't be running saws. Weight distibution does however make a noticable difference on top handles when using one handed but with two hands on the saw you'd never notice. Everybody on this forum could run either a 260, 346, 5100-S, and 261 for the same number of hours in a day and not be any worse for wear. You may find a preference from one saw to the other in regard to power, cutting ability etc, even sound, but balance is highly subjective. To me my 5100-S feels good, and the 260 I played with felt good too. I'm sure a 346 would be lovely and I may even get a grin picking up a 261
In fact a 261 is on my shortlist and "may" even replace the 5100-S one day.
Maybe my thoughts don't count though as when I use my 3120 every saw on earth feels light
(OK, maybe not the old metal ones
)