If I had all the great personal experiences that Eric / Woodsdrummer and TKnife had with Rob, I know I would have a very difficult time in letting the special knives you own go, but I can understand your reluctance to keep them as safe queens. Right before Rob's tragic accident I was fortunate enough to acquire an early Nordooh ( like the one you own Eric ) along with an early A2 Aurora that were users. In fact they were on Rob's bench to be refurbished and become what Rob referred to as "ghost" Simonichs because the refurbishing process would lighten his logo. After I got them back, I couldn't decide whether to leave them unused, sell them, or break down since they were already used. I have only ever talked to Rob on the phone, and yet the knives are special to me and can't bring myself to sell them or to use them.
At the same time I acquired an early Talonite Kanji ( still new) that I intended to carry on a regular basis. Again a great design qne user, but it is sitting in my safe along with some other unusual custom Simonichs that I got.
For now I don't see any custom made by Rob being worth any less so I think you still have lots of time to make up your own mind.