Tube fly patterns and concerns

[btree]

So I got an HMH tube fly kit and am about to venture into uncharted waters. Been tying for about 20 years and am happy with tying on hooks, but was wondering if there are any things I should watch out for or make sure I do when tying tube flies. I imagine that the basics are all still the same, but there are a few things like junction tubing and how these flies swim that make me wonder.

Do you tie your junction tubing into the fly, or just leave space to slide it on after? I've seen demo's online for both styles...

Also, do these flies tend to swim with a consistent top side and bottom side?
I'm thinking about tying up some spey patterns on tubes but am worried that they might spin or swim upside down or sideways...

The patterns I'm looking at tying are: General Practitioner tubes, Steelhead Akroyd Tubes, Coal Car or Purple Austrian tubes, Lady Caroline Tubes and the like - patterns that have a defined top and bottom...

These patterns tend to swim nicely when they have the "keel" of a regular hook to guide them through the water, but I'm concerned that they will spin or flip more so than is desired (I know all patterns will flip around somewhat, especially in faster flows)

I've also noticed that many tube patterns take a 360 approach to design where there is no top, bottom or sides, just the same at all angles...so that's why I ask.

Thanks

[Abbott101]

intruders and gp's are the best to tie on tubes. And a cheaper way to tie flies on tubes is to use q tips just cut off the nds of the q tips.

[btree]

I take it you are refering to the q-tips which are plastic and not paper