Hi everyone, so I'm developing some custom printed circuit boards and I've been using Fusion 360 to learn to design my own enclosures for the boards. I also have some other various enclosures that I want to prototype using a 3D printer, but surely there will come other things I will want to design and print later, maybe some automotive-type stuff. I won't be printing any small figurines or anything like that.

A couple of years ago a coworker showed me something printed using filament (FDM), and something else he printed using resin (SLA). I loved how much more solid the resin variant felt, and how much better the detail was on the resin-printed item. So using that knowledge, I may have jumped the gun a little and decided I wanted a large volume resin printer. I ordered a QIDI TECH S-box, and between the bad instructions that are written out of order in broken English, to the broken English used when operating the GUI on the printer, so the fact that the holes drilled in the build plate causing nubs on everything I print..... I'm questioning my choice. I do want some of what I'm printing to be able to survive sitting out in the sun during summer, so I did order some "ABS-like" resin, but I'm seeing there are a lot more options currently with filament, such as carbon fiber-infused nylon.

So now I'm looking at some high-precision, large build volume (because some of my enclosures will exceed 140mm in length) FDM printers. I want high precision because I'm trying to keep minimal clearance (ie: .25mm or less, if possible) around all external-facing connectors on the boards. A lot of tight tolerances on the enclosures, including how they fit together. The boards are using surface mount components, and are assembled by a machine, so the consistency in the connector positioning isn't an issue). I don't want to have to go back and sand or file loose material and such, so now I'm wondering if one of these 3 FDM printers might make more sense for my application:

FlashForge Creator Pro
https://www.amazon.com/FlashForge-3D.../dp/B08GJ44T6Q

QIDI Tech X-Plus
https://www.amazon.com/Intelligent-I.../dp/B07JCKNQSZ

QIDI Tech X-Max
https://www.amazon.com/Large-Intelli.../dp/B07JBXVCWG

The Creator Pro would give me the option to print 2 pieces at the same time (not sure if I can do 2 DIFFERENT pieces at the same time), but the reviews on the QIDI products are a little better and the volume is larger..... though I'm right back to dealing with the broken English from QIDI. But perhaps with either of these FDM printers I'd have the ability to upgrade the nozzles and use some more durable materials, like the carbon fiber-infused nylon, when needed.

I understand a lot of this comes down to personal preference and use, but is there anything else I should be considering when planning to prototype PCB enclosures with tight tolerances, when it comes to choosing a FDM or SLA printer? Thanks so much to anyone willing to help!