It is easy to keep the IV, I am keeping mine, at present there is no intention to reintroduce it, but that can always change in the future.
As the owned IV is a Donor Arm to be used, 'when it eventually happens', on a DD TT with a Plinth Design to have Three TA's mounted, ( 1 @ 9" - 1 @ 12" - 1 @ Variable P to S dimensions ). The idea that comes and goes, could be put in place to show visitors to the Home System the differences between TA's on a TT that can mount Two TA's.
The present plan for the TA, is to watch how the value appreciates as a used sale item. If the IV or V model is entered into the used market today, and the sale is carefully undertaken. The two models are almost on par for being accessible to funds as a ATM.
There is still good experiences to be had, if the footwork is put in to get out and experience alternate devices being used to enable a Cart' to function. One of these experiences may prove to have a profound effect and make the idea of change to become a unavoidable. A decision may be forced to be made, where one option chosen is seemingly going to be much more advantageous.
Making a decision about the IV, that's how it went for myself anyways.
