The project cab can be modelled in a program called Carlson Hulls in moments, and cutting files produced for each panel and made over a few days. That is the normal way of doing things where sandwich construction of monocoque structures are concerned. The modelling takes moments, but the construction process is very work intensive
The Cub Sandwich project is my attempt to evolve that and develop a better workflow. V1 is the result of building up the SOR or statement of requirements items one by one. As designed, it moves the constructions process to the software and automation and the actual handiwork remaining becomes just assembly. The electronics bay in this is designed to take 840wrms of amp modules as well as a DSP board. The stereo speakers are likely to exceed what the amps can supply, so I will be redesigning this part to take only the 600w sub amp and leave the stereo amps and other electronics outboard. The V1 design will be just an active sub with DSP and balanced preouts for stereo
Now with V2, the aim is to reduce the time it takes to create each part in automation as well as a cab with more internal space. The active driver is going to see a clean 600wrms. V2 will explore increased SPL by unfettering the driver from space restrictions. As well, the new electronics bay will allow larger amps for the stereo channels as well as space for an optional tube stage between the DSP and sub to experiment with sweet over driving
Take a close look at the left info panel in the pic. This is v2 reaching the state of completing the curved sides only in the sandwich layers. There is a 8mm core layer with 1mm skins either side. The schedule is single layer of 200gsm biax or dual 0.5mm alloy sheet each side of that 8mm PVC boatbuilding foam core material. Panel shows 3 sketches and the number of elements it takes to get to that stage. Most of the funny named elements are not even structure features. These are elements to help create another element or a feature. All those elements are just for the curved sides and setting overall design dimensions
The trick to keep FreeCAD stable while working is to reduce the number of sketches needed and instead exploit some padding and pocketing features that the program doesn't bring up as available in the task list
Below is a closeup of a rear corner, showing the skins and core. That back panel showing and sticking out is not a cab feature. That is there to keep everything even like a concreting formwork. That element will be removed once the flat sides are on and a proper forward transom will be created there as a structural item