Guava - ? Blossom End Rot

SMG1 starts with ...
Hi. I'm having problems with my guava. Having spent a bit of time on google, I'm thinking it's blossom end rot but would be grateful for advice from others who might know better.

Pictures attached. It affects every one of my fruit so that, before they get ripe, the fruit is spoiled. No obvious insect entry marks and no insects or maggots evident on or in the fruit.

The spoiled bit is very soft... almost translucent.

I've tried adding calcium to the soil as per some of the googled advice... seems marginally improved but not cured.

Any advice much appreciated. The tree is looking great and fruiting heavily... but I have to eat the fruit when still green before it's spoiled... and the taste just isn't the same.

Cheers

Smg1

Pictures - Click to enlarge
Picture: 1	Picture: 2	Picture: 3
Picture: 4