Fi Q options and recone

[appleyard 0]

I have 2 15Q (1st gen with no options) with 2 saz1500d and it gets hot over a short period of heavy bass music. I was wondering is there any way I can increase the power handling of the sub. I am not from the US so to ship the motor over to get the partial BP would be expensive.

would it be possible to use the BTL spider on the Q or other options? I know changing the spider would increase Fs and Qts but would it be significant?

thanks