Tiered Shipping Fees per specific items + integration with Printful possible?

Hi,

I have been looking at 2 woocommerce extensions, can u help me figure out if either would suit my needs please?
A/ https://woocommerce.com/products/table-rate-shipping/
B/ https://woocommerce.com/products/flat-rate-shipping-plugin-for-woocommerce/

Background: I am currently selling products on my Woocommerce store using Printful integration, orders made are fulfilled and shipped by Printful, therefore I have not currently needed to configure any shipping rates.

I want start selling stickers made outside of the prinful ecosystem. Meaning I make and ship them personally.

I would like to offer a tier based shipping option for these stickers only. I plan to have a few designs, let’s call them X,Y and Z. So, for example:
1-10 stickers shipping fee = 3.00
11-50 stickers shipping fee = 5.00
50-199 stickers shipping fee = 10.00
200+ stickers shipping fee = Free

I would like to be able to integrate your plugin into my current setup, are the following configuration possible:

1.Is your plugin going to work seamlessly alongside printful + woocommerce?

2.Example order 1 can this be configured?:
2x t-shirts fulfilled and shipped through printful (their shipping fee remains unchanged) + 30 stickers design X (as above example fee = 5.00), so total shipping for this order should be (printful’s shipping fee) + 5.00

3.Example order 2 can this configured?:
Customer orders 30 stickers (design X) and 10 stickers (design Y), (total stickers in order = 40) will they get charged shipping 5.00 OR will they be charged 5.00 (design X) + 3.00 (design Y) = total shipping 8.00?

4.Can these tiered shipping fees be configured to be different costings for USA and UK customers?

Thank you very much in advance.

The page I need help with: [log in to see the link]