Working on imported data (without the access to request new translations), the sheet metal part imports as a couple thousand small surfaces. There is an inner and outer set of surfaces. The goal is to get all of the inner (inside of the roughly horseshoe shape) knitted into one surface, or thereabouts. The surfaces knit together, but it is very painstaking to individually select all of the surfaces and then knit together. It can be done in groups, and then knit together the sub-knits, but it still requires a lot of individual picking.
Is there a way to select all "contacting" surfaces or something similar, to avoid the tedious selections? Filter to contacting faces does not work. I've tried to box-select everything, but it will not knit because the inner and outer are not connected.
Is anyone aware of a good method to do this in a time-effective manner?