Addendum - as I see no way to edit my post.

I tested this on a backup server:

Using tool like myphpadmin

open the products table

SQL Update products set products_weight = 3;

AARRGGHH ! Scary

then go to zc admin turn off all shipping methods other than allow free and edit and allow shipweightunit

edit it so handling fee is 3.00

leave other multiplier as 1

go to config>>shipping packaging and set packge tar and large package to 0:0
turn off all weight display refereences


so what this seems to do is:

Now all products ship for 6 (with weight of 3) plus 3 per additional item unless weight of item is <> 3

select test1 item and add to cart - shipping is 6 yea!

add another test item test2 with weight 15

add it to cart shipping is 21

add another test1 and shipping = 24

add another item 2 and ship = 39 !!!

Comments PLEASE - have I Screwed anything else up???