Same thing for my Plus/Drexel128k with the MicroMac Accelerator. With no RAM on board it's fairly low profile but needs the stretch apart process.
It wasn't until the SE with its low profile/parallel to the MoBo PDS expansion capability and slotted chassis that any card of any kind could be installed in a compact without using the chassis stretch method. Even then, oversize/out of spec PDS accelerators generally required the stretch.
The vertical PDS card spec of the SE/30 was far superior, as the card was installed/removed prior to the MoBo procedure.
It wasn't until the SE with its low profile/parallel to the MoBo PDS expansion capability and slotted chassis that any card of any kind could be installed in a compact without using the chassis stretch method. Even then, oversize/out of spec PDS accelerators generally required the stretch.
The vertical PDS card spec of the SE/30 was far superior, as the card was installed/removed prior to the MoBo procedure.