[PJL]

Under normal operating conditions it should be OK as the Vce is only 10V but fault conditions such as instability could be a problem. The mains transformer shows a 117V primary with no means of adjustment so I guess you are using a stepdown transformer that may deliver a higher voltage under low load conditions and therefore increase the -45V. Ideally, you would use a variac to keep the voltages under control but a simple lamp limiter would help.