I think johnw was speed reading and missed a few words.
Thank you for being a good person wanting to enrich his little life.
I would say keep him close. Riding on your should will not spoil him and it must be a comfort to have body contact. The tiels on
www.YouTube.com should be the only ones he comes in contact with. If he had been raised with another tiel, that one would know of his problem. A new one would just run over him.