I'm sold on Fusion 360 now too. The frustrations it causes are less than the frustrations sketchup causes trying to make the model a true solid. The main two issues I've been running into with Fusion both occur after changing a parameter that is used in a sketch causing down stream errors. One is a dimension constraint will move a line to the opposite side of the line it's being dimensioned to. The other is this causing a line that was projected into another sketch to be lost. IMO neither of these should be happening and the combination of the two make it so the parameter changing doesn't work the way it should in any moderately complex model. You've hit on a definite secret. The first layer is the most important thing to get right. If you have a perfectly flat print bed, getting it nicely leveled will solve all your problems. But more than likely your bed isn't perfectly flat. In that case the next step up is to get mesh bed leveling enabled to compensate for any unevenness in your build plate. It's much easier with a probe, but Marlin supports doing it manually. Well worth the effort if you're doing any printing of larger parts with big flat surfaces against the build plate. I just got a BuildTak system I'll be installing on my printer this weekend. I'm hoping that along with 7x7 mesh bed leveling using my BL Touch will solve my bed adhesion problem with the x gantry parts I've been trying to print. Evidence from the case printing at work on the Prusa MK3 printers indicates it will. If it does I'll get the rest of my parts printed out and installed including a new X-Carriage that will be using a Bondtech extruder instead of the Wade's extruder. Then I'll only have a small issue with some Z banding and my part height being off by 50-100% of a layer height on a finished part. That one is really perplexing me.