Boring MasterSpool

Design based on RichRap MasterSpool V4.
I really like many of MasterSpool idea and features of V4 spool, but it takes a while to print and I believe it could use less material and print time. Visual also looks a little bit too interesting for a spool. And I hate that the zip tie slots do not align, when screwed together.
Other solutions do not use threads, that I like about master spool, also there should be a place to attach sticker with filament data.

Things I like about my version:

• looks boring
• needs less time and material, 90mm/s, 0,3mm layer (check print settings) requires in total 8h and 170g of material
• Thread is really tight
• Zip tie slots almost perfect match
• Simple structure and design, easy for me to edit original files
• No writings on walls
• From original design filament end slots in one wall, but 3 of them

What I do not like - zip ties catch, when screwing parts together.

Most basic dimensions are almost the same as original MasterSpool V4, works perfect with Das Filament 1,75 mm PLA spool. Do not have other brands to test it with.

EDIT 30.06.2020:
Added also a file for Filastruder 1kg refills that have 62mm inner width. I have not tested it, I hope someone will verify the fitment.

EDIT 03.07.2020:
Made a bit narrower Filastruder 1kg refills spool that have 58mm inner width as I got a report that there is a few mm gap left. This matches the original spool width