Indeed , if you look at my pics ive done that by insering a stainless steel bush into the steering pin on the hub and spacing the bolt and rose joint down by the same amount .
Our new kit will allow the Hub pin height to be moved upto an inch making 3 dr hubs un-neccessary .

Will we use the Centres of LAG castors as the steel tube to weld under the TCA ,you can probably get the bit of tube from BnQ mate !