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Easy print, no supports reqired, 0.2mm works well.

Designed for multi-colour printing, but there is a variant of the top you can print with a colour change after the first layer. Just keep support off, and the second layer will print ok even though it's 0.2mm higher. It is not as clean looking as the multi colour(see comparison pic), but it still looks good and gets the job done.

Assembly is straigntforward, first install four 8x3mm magnets if using, then position the spring, the ends sit in curved recesses, so just make sure it's postioned well, then align the top and slide it vertically in place.

.Step file attached for mods if you need to change something.