I'd love to be able to mix basic CRUD queries with Modl with more advanced, raw sqlx queries.

The one thing holding this back is assimilating a *sqlx.Tx within Modl like this:

func ORMTx(tx *sql.Tx) *modl.Transaction {
    // where dbMap is a previously initialised *model.DbMap
    return &modl.Transaction{dbMap, tx}
}

Doing this would let you chain sqlx.Tx raw queries alongside Modl queries:

tx := sqlx.MustBegin()
SomethingWithSQL(tx)
SomethingWithORM(tx)
tx.Commit()

Or is mixing the two crazy?