James,
We will take you up on that offer, thanks very much. Our two launching trolleys are a standard West Mersea 220 and a standard RS200 trolley - both fit onto the standard WM 220 roadbase. Let me know if you think there will be any issue on getting them fitted or lashed on your trailer. Please give me a call or send me a text with your number. My mobile is zero7714 zero64 97seven.
Thanks,
Andy