Upload problems with ESP8266

Uploading to ESP8266 is somtimes a nightmare. Only after several retries upload starts, and somtimes only at a very low speed.

When viewing output from the upload I can find the compiled .bin file, and I tried to upload this using the expressif tool flash_download_tools_v3.6.5.exe. (Arduino IDE uses ESPTOOL.EXE)

It not only uploads the first time I try, but I can also set upload speed to 1,500,000 bps - and still uploading first time.

Is it possible to change the Arduino IDE installation (ESP8266 device) to use the expressif tool?