# 4.27 with microswiss custom firmware
**URL:** https://marlin.crc.id.au/forum/t/4-27-with-microswiss-custom-firmware/822
**Category:** Feature Requests
**Tags:** builder
**Created:** [13 April 2022 06:12 UTC](https://marlin.crc.id.au/forum/t/4-27-with-microswiss-custom-firmware/822 "2022-04-13T06:12:17Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Ben3dprinting](https://marlin.crc.id.au/forum/u/Ben3dprinting)
#### Post date: [13 April 2022 06:12 UTC](https://marlin.crc.id.au/forum/t/4-27-with-microswiss-custom-firmware/822/1 "2022-04-13T06:12:17Z")
I’m having trouble with custom firmware for my Ender 3 with 4.27 board, bltouch and microswiss hotend and DD, when I use the custom my filament does not extrude, I can use the Marlin firmware listed but it prints off the bed, Can you add a custom one to the list I can update regularly.
I have a Bl touch with 4.27 board with microswiss hotend and I would like to have PID autotune enabled and tramming, as well as the 25 point mesh system if it’s possible
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### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [21 April 2022 07:12 UTC](https://marlin.crc.id.au/forum/t/4-27-with-microswiss-custom-firmware/822/2 "2022-04-21T07:12:42Z")
You should be able to do all this via the builder - but it will require you set the correct options.
Load the stock config, and make the minor tweaks yourself for hotend home offset and BLTouch etc etc…
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### Author:  [@Ben3dprinting](https://marlin.crc.id.au/forum/u/Ben3dprinting)
#### Post date: [25 April 2022 03:23 UTC](https://marlin.crc.id.au/forum/t/4-27-with-microswiss-custom-firmware/822/3 "2022-04-25T03:23:54Z")
I did try to do this, my extruder wasn’t working correctly
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### Author:  [@Daniel\_Harris](https://marlin.crc.id.au/forum/u/Daniel_Harris)
#### Post date: [10 March 2023 13:39 UTC](https://marlin.crc.id.au/forum/t/4-27-with-microswiss-custom-firmware/822/4 "2023-03-10T13:39:14Z")
is there a video on using the builder?
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### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [12 March 2023 04:42 UTC](https://marlin.crc.id.au/forum/t/4-27-with-microswiss-custom-firmware/822/5 "2023-03-12T04:42:16Z")
Not that I know of - however you can load the default config for your printer type and make changes from there.
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### Author:  [@objecttothis](https://marlin.crc.id.au/forum/u/objecttothis)
#### Post date: [18 March 2024 09:49 UTC](https://marlin.crc.id.au/forum/t/4-27-with-microswiss-custom-firmware/822/6 "2024-03-18T09:49:04Z")
@Ben3dprinting your problem with printing the line off bed is because you need to adjust your X\_MIN\_POS to -5 ([https://cdn.shopify.com/s/files/1/1210/0176/files/Leveling\_probe\_installed\_with\_generic\_or\_Creality\_Marlin\_Firmware.pdf](https://cdn.shopify.com/s/files/1/1210/0176/files/Leveling_probe_installed_with_generic_or_Creality_Marlin_Firmware.pdf)). This setting is found in the Printer Options tab of the Firmware Builder. Do not set Y\_MIN\_POS to -10 on the Ender 3 though. It will cause gear slippage on the Y axis because it tries to push the bed too far forward.