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The touchpad is improved to me at least after I added both VoodooSMBUS and VoodooRMI Like @Jake Lo suggested. But another thing is the touchpad was disabled for like a second after typing any character with the keyboard (I think this is the reason that made the touchpad feel clumsy) so I disabled `DisableWhileTypingTimeout` in VoodooRMI and `QuietTimeAfterTyping` in VoodooPS2Trackpad, surprisingly the default value is `500000000` lol I attached my EFI with these changes, It's basically the same as OP but I made changes stated above and replaced the BCM wifi/bluetooth kexts with intel kexts for the combo card that came with the laptop (intel 8265) EFI.7z

No, those are needed, do not delete anything. The uuidgen you generate goes into Platforminfo along with serial # etc

You actually don't need to generate a SSDT. SSDT-PLUG.aml is all you need and it'll work for both i5 and i7. No changes needed. If you are using a generated SSDT, then remove SSDT-PLUG. You'll also need to generate a different SSDT for i7. IGPU only model means it only has an Intel HD graphics. Some model comes with discrete graphics like an Nvidia or AMD, which are not supported anyway and must be disable via SSDT patching. If your model has it, it should show in the BIOS under graphics. It is safe to upgrade to the latest BIOS, as the hot patched SSDT are not BIOS dependent. Yes, follow the same BIOS setting from Hervé's BIOS guide. With ApplePS2Controller, you should have 2 fingers scrolling, tab to drag (enable via Accessibility/Pointer Control. Trackstick should work as regular mouse, but with assistance from SmartScroll, you'll be able to scroll with the middle mouse. Not sure what version of VoodooPS2Controller you're referring to. With acidanthera, you probably only have keyboard and touchpad, I don't think it's made for Alps touchpad which is what you have for this model. You'll need the version (same name) by Dr. Hurt, you can find here in this forum or one by 1revenger1 which is another version for Alps you can find in Dortania's OC guide. For me non of the Alps version works well for me. I continue using ApplePS2Controller, only issue with that version is that you'll need to double tab the Caps key to enable and twice to disable. In the end, it's up to you which version works best for you.

Yes and you can look that up, it's well documented in numerous places/threads/posts. Your Crucial model is not affected.