The next step will involve assembling the inserts. But before that gets done the 2nd gen inserts will need to be addressed.
As said they are short, 2 front , 1 rear shorter. They are shorter in both body and shaft length. Because both are shorter the springs will be artificially tensioned and the shaft will be at full extension the majority of the time. It will also limit downtravel of the suspension(tires stay on the road, more control over steering, braking etc).
The quick solution is to extend the length of the strut body with a simple spacer.
These are simple 1 diameter pipe couplings(1.5 long and 2 long) I found at the local hardware store.
They fit over the snout of the insert well and add the length thats necessary . Longer bolts(12x1.5) than what was included in the kit are also needed. All told these simple spacers added 1 to the front inserts and ½ to the rear.
While this wont concern folks who will be using the 1st gen Specials or using coilovers(has adjustable spring perches) or lowering springs (shorter and will not have the struts in tension the majority of the time). Its good info nonetheless.