21700 LiIon holder for Promovec Carrier case

Use strong metallic Promovec Carrier nXL casing to build new 10S3P pack from 21700 cells.

Either build 3 blocks of 3x3 cells plus 1 block 1x3 cells with same dimensions as original 18650 pack and keep innards (lock, bms, connector, light) intact.

Or remove original innards and use casing for 12S3p with 4 blocks of 3x3 cells.

Set includes holders for 3x3 and 1x3 blocks, endplates, spacer between blocks, backplate for bms and  dies for copper/steel bus.

Print backplate and spacer (trenner) from TPU.