5thC Horse Archer?

[Sagittarii]

Hello, finally putting this kit together.
I am getting back into horse archery and would like to present a C5th century impression.
Been having a look about and trying to work out just what I need to do. Have had a look at Comitatus and think they have a great look and skill set going on.

Have some bits and pieces that I have picked up over the years. A Hun bow, Deepeka cavalry helmet and finished my spatha today.

I have some plans for a Steppe type saddle and intend to build one.

I guess if anyone would like to help and point me towards clothing options? That would be a great help. Colours for instance? Can I use blue, green or maroon wool for the tunic/ trousers? What sort of pattern for the trousers?

I can make a submarlis, but what thickness leather should I use for the Pteruges?

Are these boots ok to use?
http://3.bp.blogspot.com/_bH2LXBIfx6c/S ... older7.jpg
http://daniyalsteelcrafts.blogspot.com/ ... results=20

Sorry for the disjointed nature of my questions.