Im not the biggest fan of PE either, but some things have helped a lot ..
Holdīnīfold; much easier to get good folds. If not folded properly, then gaps appear. Also very useful for holding items so the small supports can be sanded off.
Glue; I use both the gel and runny types. The gel is best for initial fixing, as it allows you time to adjust. As somebody mentioned already, the runny type can be used with in small amount to secure. I use stretched sprue for this.
Soldering; This is so easy,Iīll never understand why I didnīt make the move earlier. Glueing folded parts, does not have the same strength. The molten solder also fills gaps, and can easily be sanded back again .
Tweezers. I use staright and "L" shaped for better positioning.
Patience; Needed by the bucketfull. Sitting for hours, attaching small brass bits, one tends to become sloppy. Add over time, and take abreak doing figures or base inbetween.
Knife. I keep and old knife and blade for this. After glueing, swipe around sides with the knife to clear away any excess glue. The knifecan be sanded as needed to remove this build-up.