Update pre-1stflight.md (#499)

* Update pre-1stflight.md

Change Airport link to Mavlink

* Make spellcheck happy

* Add link to lua

Author: ot0tot

docs/quick-start/pre-1stflight.md

@@ -146,15 +146,15 @@ If you use 200Hz and 1:2 Tlm ratio the stars will not even blink because the upd
 
 ## MSP
 
-To configure Betaflight from your transmitter it's possible to use the Betaflight lua scripts. 
-This requires the telemetry feature enabled for the RX+TX. If the telemetry page of OpenTX does not show regular updates for all sensors the LUA script will also not work.
+To configure Betaflight from your transmitter it's possible to use the Betaflight lua scripts. If you are having trouble, make sure you are running the latest [Betaflight nightly lua](https://github.com/betaflight/betaflight-tx-lua-scripts-nightlies/releases). 
+This requires the telemetry feature enabled for the RX+TX. If the telemetry page of your radio does not show regular updates for all sensors the LUA script will not work.
 
-To get a responsive UI configure ExpressLRS for fast data transfer so make sure to use something like `200Hz/500Hz` with `1:2` Tlm and a serial baud rate of `400000`. Currently, MSP is limited to `50Hz` on `115200` Baud and does not work with a `500`` Hz` refresh rate. The initial VTX tables download does take some time - but is cached after that. 
+To get a responsive UI, configure ExpressLRS for fast data transfer. Use something like `200Hz/500Hz` with `1:2` Tlm ratio and a serial baud rate of at least `400000`. The initial VTX tables download does take some time - but is cached after that. 
 
 If you get a "retrying" message while saving changes it means that the Lua script did not receive a response fast enough. But the change usually still goes through so try reloading the page to check if the change was saved. With the recommended settings this does not happen but with slower settings, it could happen.
 
 ## MAVLINK
 
-See [Airport](../software/airport.md).
+See the [MAVLink](../software/mavlink.md) setup guide for more info.
 
 **Done. Go Fly!**