Extruder/Hotend Covers for TwoTrees SK1 3D Printer (Easy On/Off)

I've only had my TwoTrees SK1 for a week now, and have had to remove the front toolhead cover to disassemble the extruder & hotend twice already.  Since my hands don't work especially well these days, dealing with the poorly designed cover that hangs on the PTFE tube, attaching with screws that are so tiny they're likely to become lost one of these times I'll be dismantling it, it was quickly apparent that a change would be in order.

I'll often do a quick search for something I'm preparing to model, and sometimes I find somebody has already done most, if not all of the work for me, and I found Hassla's “SK1-Fanshroud-Backshroud-Partsfanduct LED”.

Hassla modeled a complete three piece cover set for the toolhead, as well as a fan duct intended for shining LED's down onto the model being printed.  It's a fantastic piece of work IMO.  Hassla's model is at:  https://www.printables.com/model/746102-sk1-fanshroud-backshroud-partsfanduct-led

Hassla's model addressed most of the issues I had with the front and rear covers, except for my personal difficulty in dealing with the tiny screws that attach them to the toolhead.  Since his design was 99% of what I was looking for, I simply opened up the screw holes to form slots, so that these covers may be slid on to the screws while they're already in place, and then snugged down.  Since I no-longer have to remove the screws to remove the covers, I'm far less likely to lose them.  Now I simply loosen those four screws and slide the covers straight out and off while leaving the screws in place.  Once whatever maintenance is being done to the hotend or extruder, I simply slide either cover back on and snug those four screws.

I printed these as oriented in the STL's with tree supports to buildplate only for the front cover, and since I printed the rear cover face down, I didn't use supports.

UPDATE 01222025:  I decided I liked Hassla's covers so much that I thought I might spruce it up a bit by adding the “TwoTrees” logo cut-out from the top of the front cover and add “fuzzy skin” to the exterior of both covers while slicing.  I left the unbranded front cover here and added a second front cover with the logo.  Use whichever front cover best suits you.

UPDATE 02242026:  In preparation for printing hotter materials, I decided to reprint the toolhead covers in ABS, replacing those I'd originally printed in PETG.  To eliminate support material issues with the "cut" logo I added to the front cover, I removed the "cut" logo and replaced it with a raised logo.  I'm adding the raised logo here as it's a much easier print for ABS and ASA.  The silvery colored covers in the photo's are of this raised logo version printed in ABS.  The PETG covers may have been fine for printing hotter materials, but I've had recent issues with PETG parts that are too close to the hotend warping on me, so I'm just trying to correct a problem before it becomes a problem.

UPDATE 03062026:  The machine I use for printing ABS is an Anet A8 Plus I have inside an enclosure out in the garage.  My intent for the TwoTrees SK1 is that it too will be out in the garage for printing the more toxic materials.  I recently began playing with PA6-CF, and I figured what better way to test print quality and layer adhesion than to reprint some parts in nylon carbon fiber.  Since I had yet to install the ABS covers I'd printed for the SK1, I decided to reprint it in PA6-CF, and it came out quite well.  Unfortunately, PA6-CF currently only comes in black, and the raised logo I put on the front cover was nearly invisible.  To add accents, I printed the logo in green PETG and glued it on to the raised logo present in my nylon-cf cover.  I added the bare logo to the file section in case anybody decides to replicate the new front cover I'm using.  After adding the green logo to the black cover, I decided it needed more green, so I added a green ring that glues into the fan opening.  It looks to me that the new cover has just the right amount of green.  :)