@vi_ Thanks for your tips. From what you say there's no need to activate/deactivate SmartReflex because of the way KP-49 is set up? Info on all of this seems quite dispersed and if someone misses a thread (or sometimes a mere post) or two on TMO, he/she is none the wiser (OP is good example). I think we all* need to have a good read of recent developments and the new "ideal" setup. I saw one post of your's in the KP-49 thread saying don't bother with xulv etc. but I'm sure there's more to know for optimal basic setup.
*we all - those of us not actively involved in creating or regularly commenting on system development.

I have found even "hidden" networks are visible to the N900. Surely if you've got the password, connecting is the same as to those networks that announce their SSID?

You said remove "widgetz". what do you mean by this term? Isn't QB for preparing widgetz? Or do you simply mean the pre-installed ones like the amazon etc.?
Clearly, an item that doesn't poll isn't quite the same level of a juice-drinker as one that does poll or auto-connects. All the same, it seems some desktop items are more hungry than others.
- what's you're differentiating factor b/w widgets and widgetz? (following comment to don_falcone)

From experience, I've found the order of installing/uninstalling can make a difference. I suppose that if nothing else is installed except CSSU and KP, on a "fresh" system, there's no difference in outcome, whichever is installed first. And, as much of the system set up should be done at this point?

I'll look into these. Thanks.