@iz3man hey man, i tried digging into the zigbee-herdsman converter but gave up yesterday because i didnt really have time. just looked back at it and im pretty sure i have a solution! will try to implement it today and i will let you know 
edit: fully functional now with the following lines
i added my own converter for the 2 bottom buttons, everything works now but im thinking about re-doing the other 2 buttons from scratch so i can get a uniform payload-format.
my 2 files look like this now:
devices.js:
{
zigbeeModel: ['lumi.remote.b686opcn01'],
model: 'WXCJKG13LM',
vendor: 'Xiaomi',
description: 'Aqara OPPLE 6btn Switch',
supports: '6 buttons, single, double and long click',
fromZigbee: [ fz.WXCJKG13LM_raw, fz.tint404011_on, fz.tint404011_off, fz.tint404011_brightness_updown_hold, fz.tint404011_brightness_updown_click, fz.tint404011_brightness_updown_release, fz.WXKG02LM_click_multistate ],
toZigbee: [],
},
fromZigbee.js:
WXCJKG13LM_raw: {
cluster: 'lightingColorCtrl',
type: 'raw',
convert: (model, msg, publish, options) => {
// i dont know yet what all the numbers do, the ones i know are below. other ones are not neccesary imo?
// #2 is a counter that increments with each click
// #4 is the button, 1 is left and 3 is right
// #5 is the action, 69 as single click and 15 as hold.
// if #5 is 15 and the button is 0 it means the last button was released
const deviceID = msg.device.ieeeAddr;
const btn_lookup = {
0: 'btn_rls',
1: 'btn_l',
3: 'btn_r',
},
act_lookup = {
69: 'click',
15: 'hold',
},
button = btn_lookup[msg.data[3]],
action = act_lookup[msg.data[4]];
if (button && action) {
// Save last button for release event if action is hold, but not if its released
if (action == 'hold' && button != 'btn_rls'){
if (!store[deviceID]) {
store[deviceID] = {};
}
store[deviceID].button = button;
}
if (button == 'btn_rls'){
if (!store[deviceID]) {
return null;
}
return {'button': store[deviceID].button, 'action': 'release'};
}
return {'button': button, 'action': action};
}
},
},
i know the formatting is messed up right now but i see no point in fixing it if im gonna mess it up again 
will fix it once im done
the link in the messages tells you what to do, even with docker stuff iirc
and can’t really help.
