I know the owner of Hong Kong models and he is a good friend of mine.
When he released the B-25 kits he took the advice of distributors who told him NOT to put weights in the kit(s) as that would make the boxes weigh more and cost them more money in transport.
As it is, he is not happy with the UK pricing of his products and feels that UK builders are not getting a fair deal.
You can get B-25 nose weights from CMK.
On this score, it is time manufacturers listened to the end builder and involved them more for research etc. The issues are that the research etc can get out there and than means that other manufacturers may beat them to the punch. Secrecy is everything.
I do like HK kits. Their Lancaster and B-17 are fabulous and go together really well and look the bees knees when done and it is the size of them that provides the WOW factor.
I didn't manage to get hold of the B-25's and do look forwards to geting hold of them at some point.
Sometimes it is a price point that ends up disappointing builders detail wise, sometimes it is a moronic distributor money grabbing and telling a manufacturer that if they put something in a kit then they won't stock it as their costs might go up by 0.001% in transport fees. Sometimes it is a lack of research when all they needed to do was reach out to someone and promise them a release kit as a thank you. Sometimes it is trying to do production on the very cheap (airfix/revell).
Is it time Manufacturers have their own online store? Maybe that time has come.