Thank you for posting, Barry.
I think all of us in the Resistance would do well to imitate Fr Pinaud and send letters of concern to those priests of the SSPX who have served us in the past, perhaps even send them this letter.
Fr Pinaud, and Bishop Tissier whom he quotes, would seem to be in error regarding the opinion of Fr Calderon. From what Sean posted on another thread, and from what I have heard BW say in the past, Fr Calderon holds that there is a shadow of doubt in the new rite of episcopal consecration, and that such doubt cannot be tolerated "at the very root of the sacraments", and therefore that such consecrations should be conditionally repeated.
Also, I am surprised that Bishop Tissier would have no concerns about sacraments administered by Cardinal Lustiger.
As an aside, it is interesting to note that Bishop Tissier invokes Canon 209 regarding common error and supplied jurisdiction to validate the Confirmations of Bishop Lazo in the event that his episcopal consecration is invalid.