How should I be connecting CE/CS pins of a SPI device to GPIO pins in userspace?

Question

I am trying to avoid using the built-in CS/CE 0 and 1 pins that the system defaults to when using SPI communication so that I can expand out to as many as 10 devices in the future. The devices in question are MFRC522 13.56MHz RFID Reader/Writers. Following some guidance from a previous post of mine, I am trying to toggle the virtual CS/CE pins I created in the MFRC522.py class initialization from userspace (Read.py). Currently, the Read.py program will get stuck when calling reader.read() after setting CS1 low.

Could this be a timing issue? What is causing it to hang?

SPI debugging techniques are also welcome.

Snippet from MFRC522.py -- (Main class of library for interfacing with RFID reader)

    def __init__(self, spd=1000000, debugLevel='WARNING'):
        GPIO.setmode(GPIO.BOARD)
        self.spi = spidev.SpiDev()
        self.spi.open(0, 0)
        self.spi.max_speed_hz = spd
        CS1 = 13
        GPIO.setup(CS1, GPIO.OUT)
        GPIO.output(CS1, GPIO.HIGH)
        CS2 = 15
        GPIO.setup(CS2, GPIO.OUT)
        GPIO.output(CS2, GPIO.HIGH)

        self.logger = logging.getLogger('mfrc522Logger')
        self.logger.addHandler(logging.StreamHandler())
        level = logging.getLevelName(debugLevel)
        self.logger.setLevel(level)

        pin_rst = 22
        GPIO.setup(pin_rst, GPIO.OUT)
        GPIO.output(pin_rst, 1)
        self.MFRC522_Init()

MFRC522.py continued -- Only place where spi.xfer2() is used

    def Write_MFRC522(self, addr, val, CS):
        GPIO.output(CS, GPIO.LOW)
        val = self.spi.xfer2([(addr << 1) & 0x7E, val])
        GPIO.output(CS, GPIO.HIGH)

    def Read_MFRC522(self, addr, CS):
        GPIO.output(CS, GPIO.LOW)
        val = self.spi.xfer2([((addr << 1) & 0x7E) | 0x80, 0])
        GPIO.output(CS, GPIO.HIGH)
        return val[1]

Read.py -- (My program for testing read functionality)

import RPi.GPIO as GPIO
import time
import signal
import sys
from mfrc522 import SimpleMFRC522

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)

CS1_Idle = lambda : GPIO.output(13, GPIO.HIGH)
CS2_Idle = lambda : GPIO.output(15, GPIO.HIGH)
CS1_Active = lambda : GPIO.output(13, GPIO.LOW)
CS2_Active = lambda : GPIO.output(15, GPIO.LOW)

tags = []

reader = SimpleMFRC522()

def signal_handler(sig, frame):
    print("\nProgram Successfully Terminated")
    GPIO.cleanup()
    sys.exit(0)

signal.signal(signal.SIGINT, signal_handler)
signal.signal(signal.SIGTERM, signal_handler)

def read_tag(tag_list, CS):
    if CS == 1:
        CS1_Active
        print("CS1 Pulled Down")
        tid, data = reader.read()
        CS1_Idle()
        print("CS1 Back UP")
        read = [tid,data]
        tag_list.append(read)
        print("CS1 Successful")

try:
    print("Attempting to READ...\n")
    read_tag(tags, 1)
    time.sleep(1)
    print('ID       TEXT\n', *tags, sep='\n')
finally:
    GPIO.cleanup()