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Nrf51822, arduino IDE Hex, uploading nrfgo

Hi everyone on the community.

I've been struggling trying to upload the hex file created by arduino using redbear nrf arduino fork on a NRF51822 -v2 board that is being sold at ebay.

the hex file size is around 30kb, while the s130 softdevice on the fork is 300kb (based on sdk10).

I thought that by uploading the OTA ready bootloader hex file from redbear i would be able to use the android app to upload the code... but it may seem that i need to use a button at some gpio to enter in that state?

Neverless... at this point i'm stuck, and wondering if by using nordic merge hex file i could merge a valid file from redbear bootloader hex and "arduino app" hex in a single file to upload it through nrfgo with j-link.

Any help would be appreciated

Project: nrf51822 to drive fastled library, accessing SD card, and using old school ESB.