I am making a breakout box for my portable generator's 120/240 outlet. It is a small [GE Powermax load center](https://www.homedepot.com/p/GE-PowerMark-Plus-125-Amp-8-Space-16-Circuit-Indoor-Main-Lug-Circuit-Breaker-Panel-TLM812FCUDP/202046231) with added outlets in attached metal boxes. (I will be adding the extra ground bar for separate ground and neutral.)

I accidentally ordered the 6/12 version instead of the 8/16 version. Surprisingly to me, the 6/12 version seems to have all the hardware on the busses necessary to support the full 8/16 setup. The only thing that limits to 6/12 (to me) is extra blocking plastic in the buss support panel, and the labeling.

Here are the inside and outside labels, instructing not to use positions 7 & 8, the lower left two positions:
[![front label](https://i.stack.imgur.com/uDl5B.jpg)](https://i.stack.imgur.com/uDl5B.jpg)
[![inside label](https://i.stack.imgur.com/1vpFR.jpg)](https://i.stack.imgur.com/1vpFR.jpg)

Here are the buss bars:
[![buss bars 1](https://i.stack.imgur.com/1UNo4.jpg)](https://i.stack.imgur.com/1UNo4.jpg)
[![buss bars 2](https://i.stack.imgur.com/Ktqv3.jpg)](https://i.stack.imgur.com/Ktqv3.jpg)

Those buss bars look complete to me.

Here are the extra plastic blockers on the breaker supports, blocking positions 7 & 8:
[![blocking plastic](https://i.stack.imgur.com/3qoxB.jpg)](https://i.stack.imgur.com/3qoxB.jpg)

FWIW both the 6/12 and 8/16 are 125 Amp panels.

So the manufacturer had to come up with a special plastic support and special labels, and not screw up by accidentally inserting them in the run of 8/16's, so as to limit what appears to be a fully functional device.

Though we cannot perhaps ask the manufacturer, is there any reason that the manufacturer would intentionally hobble the device so it cannot be used to its full potential?