I am interested to know this also as the board from ps1's and ps2's I have are highly populated on both sides instead of one like motherboards.
Also, I have found that certain boiler pcbs can have partial (usually around 50%) high grade boards that are also dual side populated. Snap off or use a wide wood chisel to separate. So far I have seen these on Vokera linea and the slotted finger board Worcester pcb's but have not seen them on Ideal Classics.