Discuss upcoming rockets

I was thinking about this rocket:http://www.ausrocketry.com/shop/index.php?main_page=product_info&cPath=80_136&products_id=2175 Hard to choose, happy to change.

My rationale is it has a dedicated electronics bay, 3 inch tube (a trade off in height / internal space), and, pending clarification a 54mm motor mount tube. The motor tube is also rather long, giving a great selection to choose from for motor. With a step down motor mount to 38mm it should reach about 1300m on a I600 motor. There is a break in the certification needed going from I to J class motors (you need level 2).

Anyway, looking over the parts:

$145 Ariel rocket kit
60 HAMR aft motor ring
37 54-38 step down
100-152 for reloadable 38mm case
38 motor case adaptors to use less propellant in larger case

• rocket rails ($5) and other bits I might have forgotten.

Once off cost is about $430. The reloadable case price varies depending on how much force the case is designed to contain.

A sample of the motor components which are then needed and used up for each flight are:
$37 H242T - 591m apogee
$56 I161W - 776m
$93 I600R - 1291m - 296m/s max velocity

On the other hand, throw a J800T 54mm motor in it ($152) and get 2km up with a supersonic 424m/s top out.

Some links for the interested:

HAMR
http://www.ausrocketry.com/shop/index.php?main_page=product_info&cPath=115_183_117&products_id=2584

54mm to 38mm step down
http://www.ausrocketry.com/shop/index.php?main_page=product_info&cPath=115_116&products_id=4472

Reusable Motor case
http://www.ausrocketry.com/shop/index.php?main_page=product_info&cPath=66_200_67_207&products_id=2015

Motor case adapters
http://www.ausrocketry.com/shop/index.php?main_page=product_info&cPath=66_200_67_205&products_id=4446