Lovely job you have there, you do not see many of this model Uni-Horse about and looking at dates on literature I have it must be 50 years old !!
AS you have the optional rear wheel weights (original cost £10) you are well set up for ploughing with the 10″ plough or using the cultivator,rotary cultivator or discs.
Uni-Horse seemed to offer a wide range of optional equipment for these machines in a effort I presume to cater for all sorts of users