morbidcactus

Old one I’ve told before, not moving to a fixed hotend as soon as possible (v6 style hotends the mk3s uses for example, really easy to mess up) have absolutely accidentally loosed the block during a nozzle change, petg was leaking out of the top super slowly, only realised the issue once the blob started pushing the sock off.

Kept that hotend around for a while as a display piece, was a total write off. That also was the event that made me start keeping spares on hand, why I have my printers more or less part compatible for consumables (always keep a few extra heaters and rtds/thermistors around, do also have at least one extra hotend around).

I’ve seen This fan (ldo DF5015H05S) mentioned as a replacement, 4.4 cfm @5000 rpm, supposedly faster than the stock fan. Having a really hard time finding a Canadian supplier (assuming from the .ca in your original post). Found a Post on the prusa forum also suggesting good results from a fystec fan, this links to an aliexpress page but have seen on eBay and Amazon.

First link is to kb-3d which I’ve have good experience with in the past for some mods.

I wish Prusa had the specs for the OEM part…

I’m almost certain I had a cheap 5v fan on my mk3s for a while after the fan killed itself (saw others complaining online about the wires breaking off at the solder pads really easily) which quick check online seem to range 2.7->3.5 cfm so flow rate wise I don’t think it’ll be a problem.

Mine live in my garage year round, I have a space heater for print days which has worked into into the -20c, lucky of I hit 5c ambient but enclosed printer helps. Have had no issues with the setup for years, it’s super dry in the winter so never had any issue with condensation, maybe a different story if I brought it in, but still idk if I’d be worried, you could use some dielectric grease if you’re really concerned but I personally think it’s overkill.

Cold enough things get brittle, but I wouldn’t be concerned for storage.

It could totally be setup to feel/work like a trackball, remember playing a bunch of warframe with mine and being able to “throw” it and have it stop when you touch the pad again, took getting used to but substantially more flexible than a regular analogue stick.