[perow1]

Themain thing about a safety buddy is to have someone to spot you the day you have something going on in your body that makes you black out on a usually easy distance. BUT!

The good thing with having a buddy is not only that you will do it safe, but you will also dare to challange what you previously thought was your limit, and that is probably way longer than you can imagine if you have not tried it before.

Your training looks good to me, every swim with your fin will condition your body/mind/technique. What i do not understand is when you wite max... Isn´t 50m your max at this point? I would say that it is a good schedule as a base, but doingit with variation will not only make it interesting it will also train different aspects of the dive. Just "pumping" 50m all the time will train one thing, but sometimes you will forget about technique just to make it to 50..
....and so on.

Go get a buddy and inform him/her about what you are doing and the risks. Make your buddy swim along with you when it gets hard and just go for it.