According to the write up the Abacus had just been upgraded, and so all the fixings had not yet been put back. (There’s certainly a lot more securing in mine)
Due to the solid wood cabinet and steel panels and mountings, there are no major problems to gigging. (And many are gigged) Later models have an aluminium cage inside and are really well secured. (Fitted when they moved up from P3 to P4 and now AMD)
Regards

Bill