See my post here https://forum.lulzbot.com/t/adjustable-heat-bed-glass-mount/38/1 I built a toolhead with parts from i-t-w.com to print 1.75 with the correct parts. It will cost ~$100 but you’ll have more flexibility. Trying to print 1.75 filament with the 3mm toolhead will most often lead to jams and frustration.
Regarding Bed adhesion, you need to lower the first layer more. There should be a way in your slicing software to lower the first layer more than it is currently. Do this AND slow the first layer down. Those are the 2 most effective ways of getting the first layer to stick better.
firstly… try on a sample of filament… many suppliers will supply a short free sample or a short “paid for” sample
secondly… read the taz texts on 1.75 filament… lulzbot said, in several postings, that they have run 1.75 without any real problems except slight (and I do meam very little) surface imperfections.
third… I have run 2.8 and 1.75 with minimal setup changes without problems… just do the extrusion speed tests
the only real problem is with very brittle (rare) or too flexible a filament