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(2020-07-31, 16:48)Magnus Forsberg Wrote: [ -> ]I'm thinking the teeth are part of the sloping cone, so the bigger cone has to also be adapted to the 44 teeth. And the edge line.
If you allow the bigger cone to switch from 16 to 48 is wouldn't fit the 44 teeth.

I think I get it. So the larger cone, instead of a primitive, should be directly modeled, along with the 44 teeth, to match a 48-sided inside edge and ring…and the transition between those and the smaller 16-sided cone and rings in the main part gets hidden behind them?
[attachment=5576]

Something like this....   But with 5,5 teeth of course.
Keep the green cone. Make an adapter surface (light blue), and a 44-sided cone (light pink and yellow)
(Here I inlined 48-sided primitives, but you need to make it "44-sided", matching the 5,5 teeth.)

Make a 1/8 subfile that will attach to the pink 4-4ndis and three vertices in the green cone.
(2020-07-31, 21:12)Magnus Forsberg Wrote: [ -> ]Something like this....   But with 5,5 teeth of course.
Keep the green cone. Make an adapter surface (light blue), and a 44-sided cone (light pink and yellow)
(Here I inlined 48-sided primitives, but you need to make it "44-sided", matching the 5,5 teeth.)

Make a 1/8 subfile that will attach to the pink 4-4ndis and three vertices in the green cone.

Brilliant, thanks for the guidance. I was just getting started with the cone as the adapter surface instead of the disc, but I see this way will probably look cleaner.

I'll use PrimGen2 to get the vertices for my 44-sided serrated polygon. :-)
A completed draft:
[attachment=5577]
[attachment=5578]

I'm not thrilled with how the pinhole blends with the shaft (or doesn't blend) when prim sub is on. I could minimize gaps by using more and skinnier cyl segments, I suppose.

Also, this part would benefit from a cylj2_3x4, if it existed (I had to manually invert cylj3x4).
(2020-08-01, 7:08)N. W. Perry Wrote: [ -> ]A completed draft

Excellent!
The only thing I don't like is the long centre cylinder, and the short one inside the hole, being divided, into the subfiles.

Don't split things going across a main axis.
1 16 19 0 0 0 -38 0 6 0 0 0 0 6 4-4cyli.dat
1 16 -23.5 2.857 0 2.5 0 0 0 -5.714 0 0 0 2.5 4-4cyli.dat
(2020-08-01, 13:46)Magnus Forsberg Wrote: [ -> ]Excellent!
The only thing I don't like is the long centre cylinder, and the short one inside the hole, being divided, into the subfiles.

Don't split things going across a main axis.
1 16 19 0 0 0 -38 0 6 0 0 0 0 6 4-4cyli.dat
1 16 -23.5 2.857 0 2.5 0 0 0 -5.714 0 0 0 2.5 4-4cyli.dat

Great! I've moved those cyls, and the pinhole subfiles, up into the main file.

Glad to try my hand at a part with some actual geometry. :-)
Subfiles are now on PT; main file has been submitted, pending admin acceptance uploaded as well:

https://www.ldraw.org/cgi-bin/ptdetail.c...s/4208.dat
Just one vote away (in the s01 subfile) from moving to the admin review stage.  Wink Thanks to all for your reviews and feedback!
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