What dose schedule do you prescribe to the HRCTV when using interstitial technique for treating cervical cancer with HDR brachytherapy?

I follow the American Brachytherapy Society guidelines (Brachytherapy 11 (2012) 47-52) which uses doses of 5Gyx 5 to HR-CTV after 45 GY external beam and 4.5GY x5 fx after dose of 50.4GY extrenal beam radiation

One has to be aware of increased toxicity in this BID fractionation

For Vaginal - I will also follow the ABS recommendation of 4.5GY x5 ( slightly lower than cervix) though I may increase to 5Gyx 5 fx if indicated by tumor location and for the intracavitary applicator since the doses are not given BID , the fractional and total doses are higher