Hello Sebastian,

this is my original d1.minimum.partitions file:

label: dos label-id: 0x4ff028f0 device: /dev/sda unit: sectors sector-size: 512 /dev/sda1 : start= 2048, size= 2196723, type=7, bootable /dev/sda2 : start= 2198771, size= 75451766, type=7

this is my original d1.partitions file:

label: dos label-id: 0x4ff028f0 device: /dev/sda unit: sectors sector-size: 512 /dev/sda1 : start= 2048, size= 2196723, type=7, bootable /dev/sda2 : start= 2198771, size= 264139264, type=7

What i did is to change the size of sda2 (my windows partition).
The original start was 2198771 sectors x 512 Bytes = 1125770752 Bytes div 4096 equals = 274846,375 - not good !
To align the partition correctly i used 2199552 sectors =
1126170624 Bytes / 4096 = 274944 - that’s good !

You just need to choose a sector start that is divisible by 4096.
I took my size from a aligned partition where AS SSD showed me that
1099776K would be ok. 1099776 x 1024 Bytes = 2199552 x 512 Bytes

Easy maths - but it is annoying , here 512Bytes shown here, 1024 Bytes shown in AS SSD and 4K Bytes needed to calculate the correct sector size.