Monoprice Select Mini Mod Questions

[andrewpiana]

(Moderators - please move if this is the wrong place, I didn't see a board for Monoprice).

Hi board! I am new to 3D printing. I think I am going to receive a Monoprice Select Mini tomorrow, so am doing my research.
There are a number of mods that it seems people recommend to this printer, and I am trying to sort through the ones that are needed and why. If you have experience in these, i would appreciate feedback.

Here are the ones I understand:
* Heated Bed Cable re-route - This seems to be the most critical / essential mod that has to be done as OOB the cable will fray and break.
* Front Button - mostly cosmetic, but very easy to do and makes the button easier to press. I get that.
* Filament Spool - mainly to rotate the spool so it's not parallel to the printer - assists with making sure the filament doesn't get twisted up during feed. Again, I understand this one.

Now we get to the ones I am less sure about:
* replace the extruder assembly at the top - from what I can tell, this is because the little lever there may break? Is this essential early on? Or can I do it later?
* add a fan to the extruder hot end - explain to me why I need a fan there? It works without it, so what does the extra cooling do? Wouldn't I want this to be hot so the filament is properly melted? There are no electronic components to really go bad here.
* add a fan to the mother board chassis - again, why is this necessary? Are people being overly cautious or is this a real problem? What does it do for me?
* Add stabilizers to the Z axis (?) rods. Forgive me if I have the incorrect axis - talking about the ones that it goes up/down on. Again, why is this needed? What's it give me? Not that stability is bad, but why is it necessary to reinforce those and how important is it? prepaidgiftbalance dgcustomerfirstthesurveypedia

I think that covers most of what I don't understand. The other mods are mostly cosmetic (adding a webcam, light, tool holder, etc). Any other mods that I am missing which I need to think about early on or can they wait? Seems like so much work for a ready to go printer. :-)

Thank you for any assistance!

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