In this remix, I have taken apart the original "print in place" thing, which was a pain to print and separate, divided it into a support piece and an arm piece, and replaced the previous joint with a simple column and socket. The two pieces are joined by inserting the column of the arm into the socket of the support and securing the connection with a M3x12 bolt. I then mirrored each part, creating Left and Right pairs.

Each of these parts can be printed separately or in a "one at a time" arrangement on the bed. Or if you prefer, I have also provided "Kit" with all four parts that can be printed all at one go.

Longer lk5 pRO

No

Yes

.2 Layers, .24 First Layer

25% Cubic

Whatever material and settings you prefer. I like PLA+ at 215c/65c.
Normal supports "Touching Buildplate" at 10% support density. .2mm support Z distance, .4mm support XY distance, XY overrides X.

Supports under and around the arm cylinder should be the ones created, and can be tricky to remove. Remove the support piece between the column and main arm first, then the round support under the column. The support is 4mm high, and can be carefully sliced of the bottom. Once that is done, the remaining support should easily just slide off the column.