I think the main problem with Speedline is they are getting "too popular" at present, and they are loosing orders that have been placed. Seems they dont have an order book, or know who ordered what and when. I placed an order for a window kit 7 weeks ago, chased them after 4 weeks, then recieved a kit for a severn class [wanted mersey] and got loads of excuses for mistake.
I did find that they rarely answer emails. and YEs, you do have to persevere with phone calls, even to the point of leaving messages on both the landline and mobile numbers.
The build's looking great, keep up the terriffic work!