Leave some parallel cells unpopulated and add them in later when you can afford them 
i’ll draw the outline for the pack structure, as it adds a little bit. The corners might be too tight.
EDIT: here’s pack’s mechanical outline
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I’m building a 16s4p brick pack already so I am not sure if I would see the point in 16s5p haha - lemme know if 6p can’t fit
You have the case. I have marked the outmost outline from the pack and the cells. Check if the corners are gonna be too tight.
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I’ll overlay it onto my CAD in a bit to check 236 x 196 with corners cut
How many segments or how much space do you have?
How deep is that case?
Would the 30Ts fit in height if you put them in a staggered (honeycomb) 2 layer pattern?
How is does the case attach to the bottom of your deck?
I assume that you could still fit your electronics in if you were to put the 7 cells back-to-back (as shown in your pic), so I can use that length as the usable one?
If someone wants to participate in testing but has no spot welder, I can offer free spot welding services, the only requirement is to pay for shipping.
No spot welding needed with this pack design though 
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Here’s a couple pics of @Plurf 's 12S1P pack. note, some of the critical features that make this thing work are removed for these pics, as those are only for the testers to know atm, but this is to give a more generalized idea what to expect for everybody else at this point.
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Did you check if the 16S6P would fit?
Whoops was reading the thread mid study break, 
is fried haha
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If I’m not too late to the party, I’d be interested in the development of an underslung pack, staggered. The 5 middle compartments are designed to take a 3s7p (21700) each. They should have the extra room needed for your design.
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I am at the moment looking for more people to take in, as @Plurf 's and @rusins 's packs are designed and ready to order. Yours seem like a good candidate and you’re giving a good amount of starting info immediately, so I have good idea what you want.
3S7P (21 cells), staggered in 2 layers like so? Outermost dimensions marked.
or in 3 layers?
In two layers, the longer layer being at the top,
Are those the exact dimensions you require?
The enclosure has a 60degree angle,
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Probably not. It’s, marketed as a single stack enclosure with enough room to for 21700s and some padding. With some fancy gasketry I may be able to get a staggered stack in there but I’d want someone else to chine in on doing that with a switchblade enclosure.
With fasteners around the lip, plus some other magic that shouldn’t interfere with the internals. But as I stated, some space may be able to be created to give the enclosure more depth.
Seems so, yeah. Though you don’t need to be beholden to that cell orientation. Whatever fits, fits.
Sorry for the delay! Busy weekend. I was able to confirm that it will fit in my pack 
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2 segments of 10S2P connected in series for the 20S total should fit.
Is the land yacht deck pretty stiff? How much current are you planning on pulling from this pack?
The 30Ts are a bit better thermally then even the P42As, due to their lower capacity (lower internal ESR).
So would you be in to test the 16S6P design?
Yessir I will. Need to order cells still though. How many amps will your PCB be cable of pushing?
How does the bms interface?
Maybe a private group message or telegram chat would be good for those who are confirmed testers?
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