Dont feel like that.even with the picks you had no idea how crap a job had been done, you see the exterior and its shiny and you have a nice interior and you use it,
many vans are like this and the owners have no idea as they are "as bought", its only usually when a problem occurs that they show up, believe me i have pulled apart some well known(not only from here) and seemingly solid vans that have had worse done,
the term restoration is about as grey as it gets , so many folk/firms (no,not all) paint these vans and very often is a run over with a da,then hit the seams with a grinder making them thinnner still then gob them up and away, what do you expect for a couple £k. something has to give, sad thing is these jobs often cost out much more than that,
sad thing is very few of them have any idea how to do it correctly let alone the skills to achieve it, ive seen better d.i.y work on here than some of the stuff i pull apart,
many firms wont take photos, all the excuses in the world ,time,dirty hands ,dust.forgot to etc etc ,one guy even supplied a camera and still they 'forgot'
so going back to your own, dont loose sleep, run it use it and at least when a problem occurs you will know whats under it and why its happening
mm