Longer runs to the corner of mids require more, and more of a turn in the fabric (like 90 degree) seems to bring some sort of a natural tension against each other rather than a rounding effect. It's bizarre, but build a few and it will be very apparent.

If you had 8 seams with cat cut (octomid) you'de need half as much cat deflection as if you had 4 seams (pyramid)?

It's where I start usually on a proto, although that assumes all have the same length. If you odd ball shaped then it would factor in as well.

The other "rule" is like 2.5 inches of deflection for each 8 feet of ridge length. So 3 1/8 inch for a 10 foot long ridge. or 1 7/8 inch for a 6 foot ridge length.

The steeper the less cat cut, you don't need much at 90 degrees :)

Another question for the MYOG masters...

Now I'm thinking about going with 7' to the peak (keeping the 12' diameter) and sewing with 1.1 oz silnylon, pole will be something beefy (probably carbon fiber pole from Seekoutside or something (need to research...))

Will be using shelter above treeline (in colorado) and during winter.

Question is, how many stake-out points should I use? Can I get by with 8 around each one of corners? Should I sew stake-out points inbetween each of these (for 16 points total around the bottom edge)? Do you think it needs any guy-out points at mid-height? If so should I place them in the middle of the panels or along the ridge lines?

add the extra tie outs and some guyouts

I use 4 stake-outs - okay up to 30 MPH - but I tend to choose sheltered locations and only 5 feet tall

Probably 8 stake-outs are all you need

Easy enough to add guy-outs - mid point - on all 8 ridgelines - grosgrain loop sewn through the flat felled seam

I have Easton Aluminum 0.625 inch - way beefier than necesary - they haven't seemed to be stressed very much in the worst weather. I recently got some 0.433 inch which I think are sufficient. So, for your tent 0.625 is probably all you would need. But, this is a little light, you might find something a little heavier is better.

It changes the game at 7 ft tall. The Easton 625 is fine for shorter tents and the .750 is decent for a tent in the 6 ft range, and could be used to 7ft, but not for snow loads and big wind. The .750 deflects way to easy at 7 ft. At about 35 lbs of load your tent will be significantly shorter and less taught.