Tattoos

To be slightly more helpful, I'll point out a couple of issues I ran into. Aside from the obvious of artists having different styles, which is obvious but trust me, you will see the difference. Instead of a sleeve, it will look patchy for lack of a better word. Not good or bad, but if you want a sleeve you probably are going for consistency.

Not all shops and artists use the same ink. There is a massive variety of inks out there and it will show. That lovely blue shade might not be able to be replicated by someone without the same ink; it's like Pantone to RGB. I wouldn't recommend switching artists without at least finding out about the ink. Again, my 2¢ based on personal experience.

Thanks for the good advice, I've thought about those aspects and am fine with the negatives, I've been tattooed by a few people already so any consistent theme element has gone, my other arm for example is quite odd, in a way that I like. I hear you on the inks but I think that will be fine too, I wear my ink out in the sun and it's way the hell aged from those pix, it'll be around forever(ish) but different inks will be ok, it's all for aging and will be worn and torn.
To be honest, I love the idea of having such a personal tattoo interpreted by two separate artists, if I can find the second one that is. I'm not at all bothered if he/she chose to tattoo over some of what is already there, like if they did Japanese cloud background in pink and orange (pulled that out my ass) and it went over the words, well it would just confirm the message of the words...
I'm pretty easygoing.