1. What is the difference between GuliKit TMR and AKNES HallPi TMR?
1) Same: technology, chips, materials, factory - HallPi.
2) Different: Included accessories.
3) In addition, as long as buy from AKNES, whether it is GuliKit's or AKNES HallPi's, we will testing(By AKNES community members) and do QC.
If there are any quality issues, we will provide after-sales service/support.
4) Regarding the price, why are the two prices different?
AKNES HallPi: HallPi → AKNES
GuliKit: HallPi → GuliKit → AKNES

2. How to replace/install the joystick of Switch joycon?
Video on the link:
https://aknes.com/products/aknes-tmr-joystick-module-for-joycons
Calibration tool:
Go to the Switch console's Settings -> Controllers and Sensors -> Calibrate Joysticks, and follow the instructions to calibrate the joysticks.
Note: The calibration data of the Switch controller is saved on the Console. If you use this controller on a PC, its calibration data will not be synchronized.
3. When turn on Switch, the joystick will input randomly until touch it, then it will return to normal?
This problem is found on both GuliKit TMR and AKNES HallPi TMR.
We have tested and ruled out many reasons such as joycon model, battery, joystick itself, but we cannot find the specific cause.
Usually, it can be restored by swapping your left and right joysticks or replacing a new joystick. And the abnormal joystick can also work normally on other Joycon.
If you encounter this problem, please contact your seller for after-sales service/support.