sudo curl -L https://github.com/goodtft/LCD-show/raw/master/usr/tft35a-overlay.dtb -o /boot/overlays/tft35a.dtbo
No bootscreen at all, just white:
Just before it goes black:

next when userconfig has loaded:
Brand: Display-G, XPT2046 Touch Controller
Native resolution: 320 x 480 Monitor
Connected: GPIO/SPI 3.5 inch TFT resistance touch screen
userconfig.txt:
hdmi_force_hotplug=1
dtparam=i2c_arm=on
enable_uart=1
dtparam=spi=on
dtoverlay=tft35a:rotate=270
hdmi_group=2
hdmi_mode=1
hdmi_mode=87
hdmi_cvt 480 320 60 6 0 0 0
hdmi_drive=2

