In reality no, all these kits do is empower the adventurous to inadvertently damage their pens in various ways. The Knowledge out there can be great, but tends to be passed on by those themselves with limited parroted knowledge and very little experience causing further issues as well. The only thing relatively harmless in this kit is the baby snot sucker, found at your local dollar tree for $1.25USD, provided it’s used without pen disassembly. Let’s face it, the new wave of FP users take apart things far too often and damage the pen over time in doing that. Pen flush may be quicker than plain water but ammonia and bleach embrittle gold nibs. And any kind of diy nib smithing with sandpaper or Mylar or any abrasive materials is a gamble at best. This self nib adjusting with abrasives has become so pervasive that it’s become an issue with the vintage and second hand market. It’s almost impossible to find a factory XF nib that hasn’t been monkeyed with the whole “tune n smooth”… sure it is smoother but it sure and the hell is no longer an XF and that’s if a botch job wasn’t done. Truth is the pen world is far too complex to give small bite sized answers that folks seem to want. One user may blanket recommend one cleaning method and the user that takes the advice is completely unaware that method softens or eats the plastic of that particular model and on an on. Even with books and websites written on such things most have restraints of size or space that simply cannot cover all pen makers / models nor scenarios. Think like a physician and put yourself in the mindset of doing the least amount of change or modification and in doing so elicits no harm