“Appliepie”, Ole Sparky is just an affectionate term of endearment. This machine doesn’t spark, after all, it is transistorized, unlike the spark gap machines this style replaced (now THOSE were the REAL Ole Sparkies!)
As for that hairzapper propaganda, I will just say that we have discussed this person’s views plenty on the site, and the most I want to say here is, bad work can be done in any format. Good work can be done in any format. When properly done, electrolysis, no matter what modality is employed, will leave skin looking like no hair ever grew there, when poorly done, any range of results is possible. This is the main reason we advise against non-professional work, and even when one does seek professional work, we advise one to sample many pros to see who is the best one available to you locally, and then, if you feel the need, you should go outside your area for better.
A home user can work their way up to doing good work, but the best work is always going to be done where one person holding the probeholder/needleholder is working on someone other than him or herself. Yet, most insist on working on themselves, instead of recruiting a partner to work together on this project.
Let Hairzapper’s site stand as a caution for why you need to follow our advice and read those books we recommended, and get a partner, and work your way up to good work. Although you can do fine work on most of your legs all by yourself, there are parts of the leg that can only be done well with the help of another person. For that, get a partner. In time, you both will be able to do acceptable work on anyone, and you can clear out things like faces, and underarms.
I also want to echo VickyCNY here, Texas Electrolysis Supply is an excellent resource and if you call them at 1-800-626-6025 you will get good information and any parts you need for this unit. You can also send it to them for a check and refurbishment if you choose. That way, any parts that need replacement, or reworking, will be done and you will have a unit that is as good as, or better than new.
In fact, TES offers a service where they add galvanic and blend to a unit like this. You could really save big time by doing that.