PeculiarReality wrote: ↑October 17th, 2022, 8:21 pmPetroMan wrote: ↑October 16th, 2022, 10:26 pm If you do only one upgrade, make it the pack lights. Seriously just adding the lights sequencing on the pack is the most visually distinctive thing you can do. The average casual fan doesn't know any of the other details. (or even exactly what the lights should look like)
I highly recommend getting the pack lights kit from GhostLabs42. Just the pack lights aren't in stock as of my posting so it won't show up on his store page linked there. If you are comfortable using a rotary tool (Dremel) and a little drilling and cutting get the bundle with the pack lights, wand lights, and sound upgrade. Just the pack and wand lights can run off the original battery, but if you install the sound kit you will need a 12v rechargeable battery pack too. (which you probably would want to do anyway.)
He has posted videos showing the three kits in operation:
Single pack mode
Dual pack mode
The only down side is you have to choose and set which of those two modes you want to use before closing up the pack and wand. Technically you can change it later but you have to open everything up again to set the jumper.
I still think that is by far and away best upgrade you can make to a spirit pack and worth every penny.
The lights and sound are the biggest issue I've had with the Spirit pack so I'll definitely take this into consideration! I've also been eyeing an ALICE frame that looks pretty accurate on Amazon, to replace the straps. Any tips on replacing the back, though? I know the soft motherboard (that is the word, right?) of the Spirit pack isn't that sturdy, so I'd like to replace it too.
Edit: I'd also like to know how I should mod the thrower. The stock Spirit thrower is *impossible* to grab and put back when worn, and the peg is slightly too small so it's constantly falling out and bashing against the ground... which is why I don't wear my pack much 
I cut a piece of sheet metal for my MOBO & used some mounting brackets to attach it to the pack. Also made it easy to attach a ALICE Frame.
The wand is bad. Find a scale kit to match your pack - I went with BOK & it was excellent - it is STILL hard to work with a wand that is not 100% scale.
Aside from that:
Replace the ribbon cable
Cut holes in the N filter and put wire screen behind it
Get some cabling hose for the one green wire
Use Yellow Electrical tape to wrap the Ion Arm Wire
Get some copper tubing for the ion arm
BOK has a scale crank arm that you can easily just put right over the top of the molded one and no one is the wiser
Use hot glue to create weld marks - If you're going to repaint it
Use bondo to get rid of the speaker holes - if you're going to repaint it
Find a good sticker kit to replace the spirit ones
Order a red see through plastic school folder & blue see through plastic folder to replace the lenses for the cyclotron & power cell.
I used an arduino to program the powercell, and took one of the leads off of that & manually made a 555 ic timer circuit for the cyclotron.
I also did the lights and barrel extend for the wand myself after I got the BOK kit.
Once I finish my wireless trap, its back to the pack for sound.